Category Archives: AR & Related Rifles and Pistols

ATF Letter June 2019: How to Measure The Overall Length Of A Pistol With A Brace

In June 2019, someone as the the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), Firearms Technology Industry Services Branch (FTISB), what was the correct way to measure a pistol equipped with a stabilizing brace that has a folding adapter (like my Galil Ace in the photo above).

They said that the overall length is measured with the brace in the folded position. So you can confirm this for yourself plus see their reasoning, click here to read the scanned PDF copy that has the names redacted for privacy’s sake.

Please note that I am not an attorney and this is not legal advice. I’m just passing along the ATF letter for people to read and interpret themselves.

I hope this helps you out.

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Looking for a hell Of a .308 AR Platform Sniper Rifle? Brownells Has The HK MR762A1 LR Package For $1,000 Off List

Folks, the HK MR762A1 LR is a heck of a rifle. I’ve been tracking them for a while and am always wishing I could afford one for myself. They are consistent sub-MOA rifles and reliable as well. Check out this great MAC review:

What is in the LRP package?

  • Leupold 3-9VX-R Patrol 3-9x40mm Scope and Mount
  • HG G28 Adjustable Cheekpiece Buttstock
  • LaRue Tactical BRM-S Bipod
  • ERGO Pistol Grip
  • Blue Force Gear Sling
  • OTIS cleaning kit
  • One 20 round and one 10 round magazine
  • 1720 Pelican 42″ case

Brownells Has A Deal That Can Save You $1,000

Brownells has the MR762LRPA1 Packages in stock.

Brownells has a good deal going for the MR762LRPA1 package. These LRP packages are not cheap by any means. List is $7,499.99 and Brownells is selling them for $6,499 and they have them in stock. Click here to go there now. Again, they have them in stock as well!

These MR762A1 LR rifles are really something and I sure hope to own one some day.

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Two Cool Sale Items At Primary Arms THis Weekend – Expo Arms 5.56 Bolt Carrier Group and Streamlight ProTac Rail Mount HL-X Laser and 1000 Lumen Light

Primary Arms is one of my go-to vendors for gun parts, optics and lights. They are having two decent sales this weekend that I thought you might want to know about.

Expo Arms 5.56 NATO Chrome Plated MIL-SPEC M16 Bolt Carrier Group

These are solid bolt carrier groups (BCGs) that come hard chromed. I’ve used them and not had a problem. Actually, I’ve used quite a few Expo Arms parts over the years and found their stuff well made and reliable.

This weekend, these Expo BCGs that are normally $129.95 are on sale for $109.99

Streamlight ProTac Rail Mount HL-X Laser 1000 Lumen Weapon Light

I’m a Streamlight fan and am seriously considering buying this unit – lack of funds is the only thing stopping me right this minute and I am still thinking about it. The HL-X Laser is a combination 1,000 lumen light with an integrated red laser. I have it’s smaller light-only brother on my AK-E and own probably six different Streamlight models and have not had one fail in use. Reliability sets quality lights apart from the airsoft toys. This HL-X model ought to be pretty wicked.

This weekend, Primary Arms has them for $149.99 on sale vs the normal $179.99 list price.


I hope this helps you get some good parts and save some money.

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Looking for a Cool AR Rifle Project? Build a .50 Beowulf

Interest in the Beowulf round is growing as people buy the low cost 12.7×42 chambered pistols, rifles and kits. 12.7×42 is the metric designation for the Beowulf and is being used by groups wanting to avoid a trademark problem with Alexander Arms.

The Beowulf is one heck of a thumper delivering massive kinetic energy on target from the base AR-15 platform. That’s the remarkable part – it uses a standard AR lower! To give you an idea of the size of the round take a look at this photo. From top to bottom: .50 Beowulf 350gr XTP, 5.56×45 55gr FMJ , 7.62×39 123gr FMJ and a loose 9mm 124gr Hornady HST. The Beowulf sure dwarfs the little 5.56×45 round!

I’ve owned two .50 Beowulf’s and my current one was built using an Alexander Arms DIY kit that allows you to add the handguard and brake that you want. They are built on standard AR lowers so if you have an AR today, it’s just a matter of adding an upper in this caliber or you can do a whole new dedicated build – it’s up to you. I’ve also done a number of posts about my builds in case you want to learn more – click here to see a list.

A Beowulf upper can mate to any in-spec AR lower. This is a Spike’s lower with an Ergo group, Magpul PRS III and Geissele trigger.

What caught my eye the other day and prompted me to write this post is that Primary Arms has noticed the growing interest in .50 Beowulf and is now carrying a variety of parts and ammunition. They have a lot of products in stock and they ship fast. I’ve placed a couple of orders with them for parts over the past month and they are still shipping stuff out either the same or next day – that’s remarkable given how busy the industry is right now.

To give you some examples of .50 Beowulf products that Primary Arms has currently, they have the Alexander Arms DIY 16″ barrel kit and also the Timber Creek Heart Breaker muzzle brake, which is my favorite Beowulf brake.

This is the 16″ DIY kit. Alexander Arms has done all the fitting for you. It comes with one magazine as well. In terms of the upper kit, I found the machining and parts fitment to be excellent.
This is the Timber Creek Heart Breaker and it does a remarkable job of reducing the recoil. It has three heart shaped ports on each side that redirect the blast backwards to propel the rifle forward and reduce recoil. The three circular ports on the top help reduce climb. Seriously, this is a solid brake.

For ammo, there is an increasing variety out there – Alexander Arms makes their own with a variety of loads plus there are other sellers out there with their own offerings. I’ve found the Alexander Arms 350 grain Hornady XTP ammo to be accurate and the XTPs really open up on impact.

The is older packaging. In 2019 I noticed Alexander was using an eye catching color scheme of navy, black and white – same ammo just a different box. The Alexander Arms .50 Beowulfl 350gr XTP ammo is packed 20 rounds to a box and Primary Arms has it in stock.
Here’s the whole Beowulf.

So, if you want a fun build, get the kit, the handguard you want, the brake you want and take it from there. For folks who like optics, I’d recommend something that can help with fast moving up close targets as well as out to about 200 yards — I paired mine up with a Vortex 1-6×24 Strike Eagle and the 1-8×24 model would be great also.

This is my 1-6×24 Vortex Strike Eagle using a Vortex cantilever mount on my current Beowulf rifle.

One last comment, I make my own magazines using the reliable but inexpensive aluminum D&H magazines that PSA sells. They typically go for $9.99 on sale to $12.99 normally and right now they are on sale in case you want to snag some – they also have their special going on where you can get one of their 36″ rifle cases plus 7 D&H magazines for $109.99

This is one of the 30 round D&H 5.56 magazines that you can use to hold up to 10 Beowulf rounds.
This is the very well made 36″ PSA rifle case deal that includes 7 D&H mags.


That’s it for now. I hope you found this helpful and have fun building and shooting a .50 Beowulf.

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Primary Arms Has WMD NiB-X AR 5.56 Bolt Carrier Groups On Sale

Folks, Primary Arms has WMD Nickel Boron bolt carrier groups (BCGs) on sale and in stock! These are my favorite AR-15 BCGs and I always recommend them. Note, they make a .308 BCG but I haven’t tried one yet.

Their Nickel Boron coating is excellent the lubricity is superb – even without any oil they move very freely. They also hold up great as well.

The following specs are from WMD’s website:

  • Bolt – Carpenter 158 heat-treated, shot peened and magnetic particle inspected.  Manufactured to government drawings.  Milspec gas rings. NiB-X coated (40% more wear-resistant than chrome).
  • Extractor – Manufactured, heat treated, and hardened per government drawings.  Black extractor buffer and heavy-duty spring. NiB-X coated.
  • Firing Pin – Manufactured, heat-treated, hardened, chromed and certified per government drawings.
  • Carrier – AR-15 or M16 style (heavy weight), 8620 material, heat treated and case hardened.  Manufacturing tolerances on inside diameters tightly controlled.  NiB-X coated for durability and ease of cleaning.
  • Gas Key – Hardened to USGI Specifications and attached using knurled grade 8 hardened fasteners. NiB-X coated.  Staked per military specifications. The knurled screw heads further enhance the effectiveness of the staking.
  • Cam pin – Manufactured, heat treated, hardened and certified per Government drawings.  NiB-X Coated.
  • Hammer – Manufactured, heat treated, hardened and certified per government drawings.  NiB-X Coated.  Can be semi-auto or full-auto.

The photo above is of the WMD BCG in my 10.5″ AR pistol. Here are a few more photos for you as well.

The WMD BCG is at the top and a regular PSA BCG is at the bottom.

So if you are shopping for a BCG – definitely check these out – click here to open the Primary Arms page! I hope this helps you out – these really are my favorite BCGs for the AR-15.

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