Tag Archives: Beowulf

The Fastest Way To Convert Aluminum 5.56 AR Magazines For Use With .50 Beowulf

Back in 2018, I documented how to convert a basic aluminum AR magazine using a Dremel and a small drum. With the new Alpha ‘Wulf build, I made four new ones real fast using a slightly new method.

With the Alexander Arms (AA) .50 Beowulf DIY Upper comes one actual Beowulf magazine built to AA’s specifications by E-Lander Magazines of Israel. This gave me a chance to see what they did differently to support the ‘Wulf and it comes down to a relief in the front of the otherwise normal AR magazine. This allows the shoulder of the cartridge to pass by without hanging up on its way towards the chamber. Everything else appeared the same in terms of the feed lips and the follower.

E-Lander of Israel makes the Beowulf magazines for Alexander Arms. One is included with the DIY Upper Kit.
This is the top front of the E-Lander magazine. Note the notched out area. On a normal AR magazinet his goes straight across,

So, armed with how basic this was, it immediately hit me that a flap sander could make a quick angled surface faster than the drum mag. So, I loaded up a 3/8″ 120 grit flap sander with a 1/8″ shank into my bench rotary tool.

The first step is to remove the floor plate of the magazine. On these D&H magazines from PSA, I just use a screw driver to lift the floor plate for the tabs to clear the magazine body. Pull the floor plate off while trapping the magazine spring. Remove the floor plate, spring and follower so they are out of your way.

I slide a small screw driver between the magazine body and the bottom plate to then lift and remove the plate from the magazine. Note, the magazine spring will come fling out.
See the tabs/ridges stamped in the floor plate? That is why you need to use the screw driver to lift the plate so those tabs can clear the magazine body.
Any rotary too will use. This is my benchmounted unit that I use on grips and what not, Any Dremel or other rotary tool would work.

So you basically use the flap sander to to cut a ramp on the inside edge of the magazine. You do not need to replicate the notch – just use the flap sander to quickly remove the material.

The left magazine is an original unmodified magazine. The middle has the ramp cut and the right unit has been reassembled. Be sure to blow out the mags before reassembly.

Using the flap sander can get the job done in 30 seconds or so – it’s literally that fast. Be sure to blow out the magazine bodies to remove all of the grit before you reassemble them. Failure to do so may cause you problems later either with the magazine failing or getting into the rifle.

The final step is to test each magazine to make sure it feeds properly. Load two rounds to test chambering in a safe place with the muzzle pointed in a safe direction. Never take a risk.

That’s all there is to it. You can convert a magazine faster than the time it took you to read this post. I hope it helps you out.


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If you find this post useful, please either buy something using one of the links to eBay and Amazon.  With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated.  Doing something like the above will help us fund continued development of the blog.


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Building The Alpha ‘Wulf – Part 3: Observations On Building the Upper, Lubrication and Vortex Strike Eagle

So things were going together really well for the Alpha ‘Wulf and no, I’m not going to say “and then I hit a snag.” I was impressed by all the parts so far. In the last post I talked a bit about the lower assembly and the upper parts I picked in addition to the Alexander Arms DIY upper. In this post, I’m going to share a few observations on the handguard, brake and lubrication.

The MI Combat Handguard

I don’t recall exactly when I first found out about the Midwest Industries (MI) Combat series of rails but used one this past Spring when I built a 10.5″ 5.56 AR Pistol. The biggest thing I like is the barrel nut. Now that may sound like a crazy thing to get excited about but there’s a reason. Look at the MI Combat barrel nut – it is a knurled circle with a groove in it. The reason this matters is that the handguard can rotate however it needs around the nut and is secured by a steel key and clamping onto the knurling. If you don’t have this kind of a design, you need to use shims or do some combination of filing and potentially crazy levels of torque to get the handguard’s top Picatinny rail to “time properly” (or align properly) with the rail on top of the upper receiver and also to get the gas tube to pass through into the upper receiver’s bolt carrier channel.

This is the MI barrel nut that the combat rail uses along with a small tin of AeroShell – 33MS/64 Extreme Pressure Grease, MIL-21164D and an acid brush to apply it.
The key shown just to the of the screws is part of the cool design. The small nub sitcking out goes into the groove to lock the handguard into position front to back. The two screws go into the handguard to both secure the key and to provide the clamping pressure onto the knurled surface of the barrel nut – it is a very elegant and effective design.
Here the key is inserted and the two screws were just inserted. They have blue Loctite on them and will be torqued down to 55 inch pounds.

I do have a few tips for you to bear in mind. Bear in mind the Beowulf has a kick. Bring everything to a torque spec and use Blue LocTite 242 or 243. Both are “medium” formulas that can be readily disassembled with the right tools and 243 adds a bit better oil resistance. I’m moving to 243 as I use up my 242 supply but it’s up to you one which you want to use.

Install the Barrel Nut First

First, just back out the set screws and the low profile gas block will slide right off the barrel. You need it out of the way to install the barrel nut.

Next, secure the upper assembly in a vise. You will need to use a fixture to hold the upper when you do this. Absolutely do not use your lower to hold the upper. You will bend things. My tool of choice now is the Magpul Barrel Extension Vise (BEV) Block. It very securely holds the upper by engaging the barrel extension. It’s the best tool I’ve found. Some guys swear by the Geissele Reaction Rod but I simply have no first hand experience with it.

This is my BEV Block along with a spare bolt carrier I use to secure it into the barrel extension akong with a cross pin.

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The following is the approximate process for installing a barrel nut:

  • Degrease the receiver threads and the barrel nut. The Combat rail comes drenched in oil.
  • Apply the AeroShell – 33MS/64 Extreme Pressure Grease, MIL-21164D to the receiver’s threads – I use an acid brush to get an even light coat.
  • Torque the barrel nut down to 35 foot pounds (yes, this is foot pounds unlike the gas block) using the spcial MI torque plate they provide and your 1/2″ torque wrench
  • Loosen the barrel nut – ideally not with the torque wrench to save it from wear and tear.
  • Torque it again to 35 foot pounds again and loosen it again.
  • Now, this is the final torque – take the MI nut down to 35-80 foot pounds. I took mine down to 40 foot pounds and called it even. Why the huge range? Well, if you have an old school barrel nut, you may need to torque it quite a bit to get things to align but in our case we just need to apply enough torque to call it even.

Installing the Gas Block

The gas block set screws do have a torque spec if you hunt long enough. Alexander Arms (AA) does not provide it in their general purpose Beowulf manual or instruction sheet that comes with the DIY upper. People cite 25 inch pounds (not foot pounds) with one drop of 242 Loctite per “echnical Repair Standard (TRS) SOFWEP-07-G12P-00032-00 Rev 1 Appx H” that I have yet to locate a copy of that manual. With that said, that is exactly what I did but I used the 243 formulation of Loctite.

Also, AA has done all the machining and used centering set screws to go into the divots in the barrel. You do not need to worry about needing to measure a set back from the barrel’s step lip – just slide the gas block on, put a drop of Loctite on each screw, carefully align the tube and then torque down the screws.

One drop of 242 or 243 Loctite and then torque each set screw to 25 inch pounds – I used my Vortex torque screw driver to tighten mine down.

Timber Creek Heart Breaker Brake

Based on my first Beowulf, it’s very critical to get a good muzzle brake. If you want to reduce felt recoil, the best things you can do in order are: 1) install a good brake. 2) have a good recoil pad 3) make the rifle heavier. Now, I do all three plus I use a hydraulic buffer that helps a tad but a good brake is absolutely critical. For me, it is absolutely my first priority and I knew I wanted to use the Timber Creek Heart Breaker again.

Here’s the Heart Breaker from the side and you can immediately see the heart shapes that give the brake it’s name. Also note the jam nut behind the brake.
A view from the top with the ports shown. The bottom does not have ports – just the top to reduce climb.

The AA barrel uses a unique 49/64-20 RH thread. If you are not using an AA barrel, confirm the thread before you order a brake.

To install the brake, I run the lock nut to the bottom of the thread and then thread the brake on as far as it will go, rotate it into final position and then tighten down the lock nut to 20 foot pounds using a crowsfoot head on my torque wrench. I’ve not used Loctite but you can if you want extra protection – I would still go with the medium strength 242 or 243 formula.

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Lubrication

To lubricate the whole rifle, I use SuperLube grease and oil. I know it sounds like an infomercial name but it actually works really good. The base is a synthetic lubricant with “micronized PTFE” (think tiny Teflon particles) added in.

If it slides, I apply a light brushed on film of Superlube grease. If something rotates, I use drops of the Superlube oil. Now some folks will disagree with me and go with all CLP or LSA or some secret blend they like – fine. This is just what I do.

After lubricating it, everything was nice and smooth plus I did function testing to make sure everything was working properly in terms of the selector, disconnector, trigger, etc. In fact, Brownells has a nice page on attaching the upper to the lower, lubrication and function testing.

Vortex Strike Eagle 1-6×24 Optic

Before I pick an optic, I think about how the firearms it is going on will be used. For the Beowulf, it will be hunting and target shooting typically within 100 yards and maybe out to 200 max plus low light situations might well occur.

Armed with that, I decided to use a Vortex Optics Strike Eagle with a 1-6 power magnification, a 24mm objective and a lit reticle. My eyes aren’t so red hot any more so I knew I would need some basic magnification while still having a wide field of view at 1x. Also, I am a huge fan of Vortex due to their quality and no BS warranty. If anything goes wrong with a Vortex optic, they will repair or replace the unit and not run you ragged.

I also opted for a quality offset Vortex mount. You need a solid mount and not something that is going to constantly shoot loose or break under strain.

How Does It Look?

I haven’t had time to take it to the range yet, but am definitely liking how it turned out. The Alexander Arms DIY upper was great to work with as were the Geiselle trigger and MICombat handguard. The PRS stock helps balance out the rifle and adds weight plus the great recoil pad that comes with it. Now, If I can just find some time to go to the range 🙂


If you find this post useful, please either buy something using one of the links to eBay and Amazon.  With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated.  Doing something like the above will help us fund continued development of the blog.


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Building The Alpha ‘Wulf – Part 2: Observations On Building the Lower and Upper Parts

As mentioned in the last post [click here] – building a Beowulf is pretty much like building any other AR15-class rifle. I put it that way because the AR10s are different and the Beowulf uses the AR15 platform with the notable exception of an enlarged ejection port. The modular capabilities of the AR platform are what make it versatile.

Lower Build Comments

First, I’d like to point out I ran into one small snag with the Spike’s lower. The detent spring and pivot pin hole had some kind of debris in it or maybe a bur. I had to chase it to clean it out. Other than that, it went great.

Normally, installing the front pivot pin is pretty easy with a tool like the one shown that helps you trap the deternt and spring. Because of somethign obstructing the hole inside, the deternt didn’t push down and actually scored my relativelyt soft tool. So, I chased the hole and it installed no problem. Two lessons learned – #1 chase the holes first. #2 – I decided to mve to a stainless steel install tool.

My second comment is about the Magpul PRS Gen 3 stock. Wow. It is really cool. First, I went with the rifle buffer tube because I assumed the Gen 3 needed it – in fact, it does not. When you look at the Gen 3, it has a modular front nose that comes apart just behind the front swivel hole. It comes from Magpul all set to use a carbine buffer tube! Now it is a fixed stock and will not adjust but you do not need to change tubes. Had I known that, I would have used a carbine tube to avail of all the different buffers that are out there.

By the way, the PRS is an expensive stock. It pays to watch for sales. I bought mine from PrimaryArms for about $189 on sale vs the $217-244 prices you normally see. Also, this is specifically then third generation model – you will see older stocks pop up on eBay, etc. The older ones will not have the really thick recoil pad or the ability to use a carbine tube.

The PRS Gen 3 is sweet! Note the really thick recoil pad and modular front end that can accomodate either a carbine buffer tube or be swapped out to support an A2-style rifle buffer tube. This gives some nice flexibility.
The carbine modular front end is to the left and the rifle is in the right.

By the way, I took the time to torque down everything including the rifle buffer tube in this case. The Magpul wrench makes it real easy to bring the nut down to the torque spec of 35-39 ft lbs.

Screwed in the rifle-length buffer tube with just a bit of moly grease on the threads.
Used the Magpul wrench and a toruqe wrench to bring the receiver extension / buffer tube down to a 35-39 foot pound torque spec. In general, I set my wrench at the lower end of a scale unless there is something very specific.

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I think I will stick with the basics going forward. In other words, I’ve tried extended head pins, bolt catches with giant heads, ambidextrous selectors and in the end, I find I really don’t need them. The takedown pins and controls are all mil-spec in this build.

Upper Build Parts

The upper is the actual DIY (Do It Yourself) upper from Alexander Arms and they do all the engineering and machining for you. I also need to point out that it is really well done. I have zero complaints on the fit or the finish.

The DIY kit includes the upper receiver, bolt, carrier, charging handle, barrel, and the gas tube has already been installed in the lowe-profile gas block. The unit arrives assembled including their already divoting the barrel for the two gas block set screws. What you will need to do is to add your own barrel nut and handguard plus whatever you want to do for a muzzle brake. The DIY comes will a thread protector for the 49/64-20 right hand (RH) threads.

Here’s the upper fresh out of the box.
They already drilled the divots in the barrel an are using centering set screws so you can just remove the gas tube, install your barrel nut and then slide the gas block back on and tighten it down.

Folks will tell you I am either particular or eccentric (maybe both) when it comes to my builds. I knew there were some parts I wanted to use on this upper:

  • MI Combat 15: M-LOK handguard. These are very nicely done with all edges beveled plus I like the barrel nut they use. It simplifies aligning the handguard and receiver rails. Also, I really like having the flexibility to add rails or accessories where needed while having a slim profile where I don’t. Keymod has pretty much died out and M-LOK seems to be the lead attachment method now.
  • BCM Mod 3 charging handle greatly simplifies working around optics to charge the rifle.
  • Timber Creek Heart Breaker muzzle brake. This is an excellent choice for taming the Wulf. I was so impressed by it on my first rifle that it was my automatic choice for this second rifle.

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Upper Build Instructions

A Beowulf upper is very much like any other AR with the exceptions of no ejection port cover and a screw on gas tube block.

Here are some third party resources on assemblign AR uppers in case you are interested:

Here Are Some Videos For Building Uppers

I always like to combine stuff I read, like the above, with videos I can watch. I always pick stuff up both ways and think the two perspectives are very valuable. With that said, here are some build videos.


Brownells also has a ton of training videos online that cover building the AR-15 overall. If you click here, you can then select whatever videos you want to watch.

Closing This Second Post

Hopefully this post gave you some insights into what I actually did with the lower and thoughts on the upper. In the next post, I’ll share some of my observations from when I actually installed the handguard, brake and ortex Strike Eagle Optic.


If you find this post useful, please either buy something using one of the links to eBay and Amazon.  With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated.  Doing something like the above will help us fund continued development of the blog.


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Building The Alpha ‘Wulf – Part 1: The Alexander Arms .50 Beowulf 16″ DIY Upper Kit and Lower Receiver

Okay, so I built my first .50 Beowulf rifle in 2018, spent a lot of time planning out the recoil mitigation and documented the adventure – click here for the post. At any rate, I sold it to move on to fund other projects but ran into a problem – I missed the ‘Wulf. There are some bragging rights when you say you have a .50 caliber rifle even when you explain it’s not the .50 BMG round. So, I decided to build another one and make it pretty unique.

The first thing I want to point out to folks is that the 12.7x42mm is the generic designation of the .50 Beowulf round and is mainly used by firms who don’t want to get into intellectual property issues with Alexander Arms (AA). If you look on Gun Broker and do some searching with Google you will turn up tons of listings for complete 12.7x42mm uppers starting just over $300. … Let me put this delicately – I would recommend that you avoid them. You will get what you pay for either in terms of performance out of the box or over time. If you do some searching you will read that I wasn’t the only buyer who had issues with Radical Arms uppers for example because of the wrong bolt being used.

If you do buy a cheap 12.7×42 upper, I’d recommend you test it right away before the warranty expires. I’m sorry – I just don’t have much faith in them.

Started With an AA .50 Beowulf DIY Upper

This time around, I decided to use an actual Alexander Arms (AA) upper and not screw around with cheap stuff. The only problem was that I wasn’t really sold on the handguards of their complete units. That and the prices were a turn off the last time. As I looked down the AA page, I saw they now sell a “.50 Beowulf Upper Kit DIY” that had everything except for the barrel nut, handguard and brake of your choice. They have both 12″ and 16″ barrel versions of the kit. As much fun as a 12″ howitzer would be, that didn’t interest me as much as building a new rifle using a 16″ barrel.

As with many manufacturers, you can buy direct from them or go to the aftermarket. I did some shopping around and found a good deal for one on Gunbroker sold by TheGunDock for $603 — Alexander was asking $735 + S&H for the same unit at the time. So you know, I had a very solid experience with TheGunDock – good communication, quick to ship and I received exactly what they listed. I value service like that.

Here’s the 16″ DIY kit from Alexander Arms. It is very nicely done. Fit and finish were excellent. The manual is for their Beowulf rifles in general and doesn’t help much with the assembly. They do give a bit of guidance with a sheet of paper that comes with the upper. A person new to ARs will need to research how to assemble an upper – I’ll give a quick summary of what I did in this post.
Here’s the upper receiver assembly – good finish. No ejection port door as the port is enlarged. I thought about making one but I really don’t need the cover.
This is their low profile gas block. All the machining work has been done for you. They already fit and pinned the gas tube plus dimpled the barrel for the two set screws on the gas block to center on.
They do include a muzzle nut over the threads. AA threads their barrels 49/64-20 RH for brakes and you definitely want a brake for a ‘Wulf. A brake is essential for reducing felt recoil – weight of the weapon and a good recoil pad help as well.
A view of the bottom of the upper – again, want to point out the nice fit and finish. Nothing gritty like you feel with cheap parts – these are very well done. They need lubing certainly but that is to be expected. Cheap parts can be so bad sometimes that it feels like two pieces sandpaper rubbing together. Everything in the AA upper slides/moves smoothly.
Here are the two set screws for the gas block. Mine were very lightly tightened and thus easy to remove. I’ll mention this again later but when you install use medium blue Loc-tite (formula 242 or 243 if you want the numbers) and tighten the set screws to 25 in/lbs each.

To sum up the AA upper, they make this build real easy. For me, building an AR is like building with Lego parts from different kits to make something unique, which was exactly my plan with this new ‘Wulf. Next, I am going to skip the upper for a minute and tell you what I in terms of the lower receiver. Why? Well, I’m a creature of habit and always build the lower first and then the upper.

An Overview of The Lower and Parts Used

The stripped Spikes Tactical lower I picked is pretty cool! You have the Crusader Cross up front and then look at the selector markings – Pax Pacis (Peace, Truce, treaty)), Bellum (War) and Deus Vult (God Wills).

I thought about using an existing AR lower from another rifle but I decided to build one from scratch. In case you didn’t know it, a Beowulf upper is actually designed to work with any 5.56 AR lower without any modifications being needed to the lower itself – same trigger, buffer, etc. The magazines are slightly modified but we’ll return to that later. So here are the parts details for the lower assembly:

Building the Lower

A Beowulf uses a standard lower so there really isn’t anything special that you must do. Thus, I’m not going to do a complete part by part instruction just for this rifle. Here’s a write up I did a while ago while building an AR pistol, which is pretty similar other than the use of a brace with a pistol vs. a stock with a rifle:

I always found having multiple perspectives to draw on can help. Here are two excellent written resources for you if you are new to building lowers:

If you would like to see it being done as well, here are some links. First, here is Larry Potterfield at Midway with a solid video on building a lower:

Brownells also has a ton of training videos online that cover building the AR-15 overall. If you click here, you can then select whatever videos you want to watch.

Closing This First Post

Okay, so you have an idea of the Alexander Arms DIY .50 Beowulf Upper upper I bought and the lower parts plus assembly. In the next post, I’m going to give you some tips/observations that I had when assembling my lower. I’ll add a link to the new post here as soon as it is complete.


If you find this post useful, please either buy something using one of the links to eBay and Amazon.  With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated.  Doing something like the above will help us fund continued development of the blog.


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Taming the ‘Wulf – My Adventure With a .50 Beowulf AR Rifle

When I first heard of the .50 Beowulf cartridge, it got added to my bucket list immediately. What’s not to like – the ballistics of the .45-70 cartridge in an AR platform that hits like a freight train. Somewhat humorously, I’d also point out that it drops noticeably at 150 yards and like a pumpkin after 200 yards but boy, does it hit hard when it does.

I have fun assembling AR lowers the way I want them and figured I would save time and get an assembled upper. In early 2016, I looked at two different vendors of assembled uppers – Alexander Arms (AA), who was the originator of the cartridge, and Radical Firearms, a discount AR rifle and assembler of uppers and lowers in Texas. A basic AA upper was around $719 that did not have a brake (or threading) and basic handguards. A decent looking Radical unit in the generic 12.7×42 chamber was only $598. It seemed like a no brainer and I went with the Radical unit.

To jump ahead just a bit — I wish I had bought a better AA upper for $923-1190. The Radical upper caused me quite a bit of grief and I am going to chronicle my adventure here because I did get it to work out in the end and was very happy with the results but I had to work for it.

Radical Arms Challenges

When I first ran across Radical, I had high hopes. In an impulse buy, I purchased two 5.56 uppers and the 12.7×42 upper. In case you are wondering why I am listing 12.7×42, that is the generic designation for the .50 Beowulf cartridge that AA owns the intellectual property for. By using the metric designation, Radical could build an upper without paying anything to AA.

When I bought my uppers, Radical was undergoing a huge growth spurt and I had to wait some period of time (4-8 weeks maybe) for the uppers. That was not a big deal to me. The AR uppers arrived and while gritty and needing polishing, they worked.  Basically, what you’d expect with relatively low cost mass assembled products.

The 12.7×42 upper was a different story. Sometimes it would cycle and sometimes it would not. Radical took forever to respond to emails and what not so I figured screw it, I’ll just treat the assembled upper as a collection of parts and move ahead. To be perfectly clear, I parted ways with Radical and did not give them a chance to fix it after I got frustrated by how everything was going.

So, I started researching on the web and found that Beowulfs use a bolt head that is slightly different than a 7.62×39 AR bolt. After cycling my rifle by hand over and over, I concluded the cartridge was not seating properly in the bolt face and ordered a true .50 Beowulf bolt directly from Alexander Arms (not Radical). Problem solved. It’s run perfectly ever since. Whether Radical installed the wrong bolt or an out of spec bolt, I don’t know. I threw the offending bolt in the trash and called it even,

Another irritation Radical caused me was when the handguard loosened up because they hadn’t used Loc-tite on the screws. My recommendation is to just use Blue Loc-Tite if you run into this – it worked fine for me. I like the handguard otherwise.

The one thing they got right was the barrel. I heard Satern made the barrel but don’t know for sure. It is wonderfully accurate with the big 350gr XTP hollow point cartridges that AA makes. I am very pleased with that combination.

Yes, I eventually got it to work.  No, will not buy from Radical again but I definitely would buy more stuff from Alexander Arms.  I dealt with them on the phone a few times for ammo as well as the website.  The staff were pleasant to deal with and shipping was always prompt.

Addressing Recoil

I was not impressed by the muzzle brake that Radical supplied and started researching the best brake for the Beowulf. Bear in mind the muzzle has a pretty unique thread at 49/64″-20 threads per inch (TPI).  In addition, I knew I would need a jam nut to address the timing so the brake could be level on the barrel and it needed to be steel and not aluminum.

The Timber Creek Beowulf Brake Rocks!

To make a long story short, Timber Creek makes a Beowulf brake that does a great job. It seriously cut the recoil back and made the biggest difference of all my modifications.  They make them with two different threads so make sure the one you order matches your rifle.

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Here it is on my rifle – notice the big ports that redirect some of the gasses backwards:

Added a Limbsaver Recoil Pad to the Magpul ACS Stock

Limbsaver makes great recoil pads – I discovered them some years ago and have used them on a number of rifles and shotguns over the years. What is cool is that they also make a recoil pad specifically for the butt plate that the Magpul CTR and ACS stocks use – plus some other models. I like ACS stocks so it was a no-brainer for me to get this thicker spongy pad to help absorb recoil.

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Weighting the MagPul ACS Stock

The next important element I did to reduce recoil was to add a mixture of bird shot and epoxy into the compartments of the MagPul ACS stock. I just stirred up a mixture of #7 lead bird shot with epoxy, filled all the voids I could and wiped off the excess liquid epoxy checking all the seams until it gelled enough. Here, you can see a hint of it sticking out.

Another benefit is that it really helps improve the balance of the rifle because otherwise it is very nose heavy.
H2 or Hydraulic Buffer

The last thing I did was to try different buffers. Bill Alexander designed the cartridge to work with a normal AR buffer. I went from a normal/H1 buffer to an H2 and finally to an Enedine Hydraulic buffer, which is in it right now. With each step, the recoil seemed to go down a tad but did not make a huge difference.

Vortex Scope

I was thinking about using the rifle either for hogs or deer so I wanted a scope that could go from a fairly wide field of vision at 2.5x all the way up to a decent zoom at 10x. Vortex is always my first choice in scopes so I bought a Viper PST 2.5-10×44 scope and Vortex rings.

This is a wicked combination. I have thoroughly enjoyed this scope on the Beowulf. It holds zero and is nice and bright.  You can’t go wrong with Vortex scopes in my honest opinion. Because of the Beowulf’s recoil, use quality rings and be very sure to torque all the screws down to spec so the optic stays put.

By the way, you may scoff at the notion of buying quality rings.  A lot of the cheap imported rings are just aluminum.  You’ll notice they don’t list a torque spec.  Quality rings such as the ones fro Vortex will tell you a torque spec to hit and they often have steel inserts for the threads.  You get what you pay for.

Note, in mid-2018 Vortex came out with what they call the “PST Gen 2” series of scopes and this first generation model has been discontinued.  The closest scopes now are 3-15×44 and 2-10×32  -I don’t think you can go wrong one way or the other.  I’d probably opt for a 2-10×32 MRAD scope to have the widest field of view at a low power.

Magazines

The Beowulf actually can use easily modified standard 5.56 aluminum magazines.  Click here for a blog post about the easy procedure.

End Result

The rifle turned out great.  The final “felt” recoil was about that of a 20 gauge slug gun, if that.  I could shoot round after round without regretting the kick 🙂

I had fun building and shooting it. As I get older the more I realize I enjoy learning about the engineering and history of arms. The “Wulf” has a new owner now and I hope it serves him well.

11/18/2019 Update:  I missed my ‘Wulf and had to build a new one.  Click here to read my post on building the Alpha Wolf.


If you find this post useful, please either buy something using one of the links to eBay and Amazon. With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated. Doing something like the above will help us fund continued development of the blog.




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How to Convert an Aluminum AR-15 5.56/223 Magazine For .50 Beowulf Rounds

When Bill Alexander decided to make the .50 Beowulf round, he really got me excited 🙂  The idea of a heavy thumper round in an AR platform really appealed to me so I bought one and one issue that popped up was where to find magazines that were not really expensive.

Once in a while the answer is really straight forward and this is one of those times.  You do not need to change the feed lips or the follower on a standard 5.56/.223 magazine, you just need to bevel the front lip at about 45 degrees (the exact angle doesn’t seem to be a big deal) so the giant .50 Beowulf bullet goes up and, this is the key part, the leading lip of the brass case hits the little ramp and goes up it vs. hanging. In this next photo – see how the lip of the case will catch?  It may catch sometimes or all the time – for me it was practically all the time.

All I did was use a medium grit little sanding drum in my Dremel to bevel the magazine’s front lip – you are basically making an ad hoc feed ramp so the case doesn’t catch.  The round you see has the big 350 grain XTP bullet – they hit like a freight train.

This is a really quick operation and you don’t need to take a ton off.  I do it with the magazine empty of course, insert a round into the magazine and test then do a bit more.  I’d repeat the removal and testing until the round went right up into the chamber.  After the first few magazines, I had it down pat.

In this next photo, see the shiny little ramp?

That’s all there is to it.  I just used quality aluminum magazines and did the tweaking.  Polymer mags, such as MagPul take more work and I simply didn’t feel like bothering with them.  I did use quality magazines and avoided cheap stuff and I also used the anti-tilt followers – just regular 5.56 followers – nothing special.

In a standard 20 round aluminum 5.56/.223 magazine, you can fit up to seven Beowulf rounds.  In a 30 round magazines, you can fit up to 10.  I never tried any of the higher capacity magazines so I can’t speak to them at all.

This approach worked great for me and I hope it helps you as well.


If you find this post useful, please either buy something using one of the links to eBay and Amazon.  With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated.  Doing something like the above will help us fund continued development of the blog.


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