I went with the Triggertech Primary Trigger because of recommendations from Black Collar Arms and in reading reviews. Now that I have it, I am very impressed. It’s a breeze to install and is incredibly crisp. One thing that is interesting is that the trigger pull adjustment has a detent and each adjustment has a “click” feel to it vs. just being a continual adjustment set screw.
Here’s the trigger. You can see I went with the straight black trigger. The safety lever that will stick out of the top of the chassis is visible and the interesting trigger pull adjustment set screw is on the bottom just forward of the trigger. The two pins in the photo are what hold the trigger in place and are supplied with the Big Horn Origin action.This is the other side of the trigger with the bolt release bar/arm (the silver diagonal). Since the Big Horn does not have this type of release, it will not be used. Notice the slight bevel on the trigger pin to aid in starting it.I keep pieces of hardwood shims and plywood near my bench so that I can properly support work pieces to avoid bending a part or marring the finish. You need to drive the two pins in to secure the trigger. I did the front one first and installed the pin with the beveled edge entering the hole first – it will help parts align as it passes through.Here’s a view of the bottom of the assembly. You can now see the trigger adjustment screw just forward of the trigger plus you can clearly see the two threaded screw holes that will be used to mount the action to the chassis. There is one on the back tang of receiver just behind the trigger assembly and the second hole is just forward of the magazine hole before the recoil lug.Next, I function tested the pistol. Note it really bugs me that I left the live ammo on the bench. Normally I do not like to have any live ammo where I am working but followed the Black Collar recommendation to ensure the bolt would close after headspacing.
It’s really important that you function test the pistol to make sure it is working right at this point. MAKE SURE IT IS UNLOADED. If any numbered step fails, you have a problem and need to investigate.
Cock the firing pin by raising and lowering the bolt knob. On the Origin – the pin will stick out the back of the bolt. This by itself is the first step – it should cock and stay cocked. If so, go to step 2.
Pull the trigger and the firing pin should be released. You will hear and feel the pin slamming home plus it will no longer be protruding out of the back of the bolt.
With the trigger pulled, work the bolt up and down and the firing pin should not cock/arm.
Take your finger off the trigger and work the bolt to cock the firing pin. Turn the safety lever to “On” or “Safe”. Try pulling the trigger – you should not be able to.
Turn the safety lever or “Off” or “Fire”. Try pulling the trigger and you should hear, feel and see that the firing pin is released and slams home.
If all of the five steps above worked, then it passes the function test.
The long silver oval is the bolt release and you can see the firing pin protruding out the back of the bolt. This indicates it is cocked/armed and I really like the immediate visual indicator plus you could feel it in the dark if you needed to.
Installing the Grip, Chassis and Brace
Next up, is the installation of the Ergo Grip onto thePork Sword chassis, and then attaching the FS1913A brace. This is all real easy compared to the preceding steps. Let’s step through it,
At this point I had the barreled action, the grip and the chassis. It seemed like it would be easiest to install the Ergo Zero Angle grip (the TDX-0) so that’s what I did and discovered a surprise.The surprise was that you need to access the screw with a head-head/allen-head wrench through a small hole they cut in the rear of the grip. They needed to do this allow for the proper angle to engage the grip screw because coming in from the bottom of the grip simply would not work for an AR-style grip. Note, I did install the big washer you see in the bottom. Call me paranoid but I was worried about whether the screw would have enough material around the screw hole to securely hold the grip so I added the 1/4″ washer just to be sure.Next, the barreled action beautifully fits right into the chassis – zero fitting was needed. The 1″ long 1/4-28 screws you see secure the action into the chassis. I added blue loctite to each, threaded them in all the way and then torqued them down to Black Collar’s recommended 55-65 inch/pounds each. They recommend being consistent in the front and the back so I went to 60 inch-pounds for both. Note, I had to use my 1/4″ torque wrench to do this as my Vortex torquing screw driver only goes up to 50 inch-pounds.This is the 12″ FARend unit that you see being installed. You remove the screw where you see the driver, slide it into place, put blue loc-tite on the end of the screw, reinstall it and then torque the screw down to 60 inch-pounds. I debated whether that would be too long or not and really wished I had bought their 8″ unit. Later on, I did buy the 8″ unit and swapped it out. I’ll show you photos of both later.The SB Tactical FS1913A brace marries up to the chassis via the rear 1913 Picatinny rail and is held in place by a rail clamp. I added blue loctite to the screw and tightened it down. They did not provide a torque spec so I torqued it to 20 inch-pounds and will see how it holds up.
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In the last post, I outlined the major parts of the Pork Sword pistol I planned to build. As it turns out, building a Pork Sword is very straight forward and I had fun doing it.
Research
As always, I did some research before I did the actual build. First off, Black Collar Arms has a nice “how-to” page and the following video tells you about 80% of what you need to know:
The only other thing I needed to look up was what to do for the trigger – as I mentioned in the last post, it has been quite a few years since I owned and installed a trigger in a Remington 700 XCR LR so I did some reading. This Brownells video really helped me visualize what was needed:
Armed with the above knowledge and a well done one page instruction sheet from Black Collar that comes with the Pork Sword chassis, I tackled the build. Let me again emphasize, this is very straight forward.
The Action, The Wrench & A Confession
You know, sometimes I’m not too smart. A cognitive bias is something where your brain plays tricks on you and there are a number of different ones. Today’s confession involves one known as a “confirmation bias” which is where you think one thing and then everything that confirms your belief you accept and stuff contrary to that belief is discarded. Yeah, that caught me here and let me tell you why.
When I bought the Big Horn Origin, I thought the scope rail was a machined part of the receiver. I assumed that – yeah, the old “you make an ass out of u and me when you assume” saying is alive and well. When the action arrived, I looked at it and thought “Oh, that looks nice” and in a little parts bag with the two trigger pins were three scope mount screws – “Oh, I wonder why those are there?” I literally wondered that.
Seriously though, the Big Horn Origin is a work of art. No sloppiness in the action and very smooth. The fitment of the parts is exceptional. Nothing was jumping out at my tired brain saying “hey idiot, the scope mount and receiver are separate parts!”
View of the ejection port side of the receiver.View of the bottomNote the streamlined bolt release and how nice the scope mount is sitting on the receiver.Here’s the recoil lug that screws in with the barrel. Note the indexing pin.
Half-asleep the morning of the build, I got out the action wrench, put it in the vise and added two layers of gorilla duct tape to protect the action. I installed the action upside down so I could juggle the headspace gages easier and then I cranked the action wrench screws down to 10 foot pounds each. Now I got lucky because I put the tape there to protect the scope mount.
Only after I installed the barrel and was more awake did I notice how very lucky I got. The scope mount was removable and only one screw had been installed so the big dummy (me) would see the missing screws in the mount, that they were in the baggy and know to remove the rail before installing the barrel. Yeah, I missed that one but got real, real lucky because of the tape and that not a ton of torque is needed for a new receiver and installing a new “Remage” style barrel.
Remage means you thread the barrel in like normal (the “Rem” part of the name), set the headspace and then torque down the barrel not like a Savage (the “age” part of the name).
Bottom line, my mind played a nasty little trick – because I thought the action and mount were one piece I discarded all information that was pointing out they were two pieces. Don’t be me – take them apart before putting them in the wrench.
This is the Wheeler Action Wrecnh #2 for the Remington 700 – part number 414521. It is basically a clamshell vise/clamp with a solid steel handle. It’s very beefy and I hear it is because the Remington barrels can be a real bear to take off. In our case, we just need the clamp portion and will install the lower part in a vise.Boy am I glad I put in the two layers of tape to protect the scope mount. For everyone else, remove the scope mount first!! The tape definitely protected the finish though and that is what I was after.This photo was taken before I installed the tape but is the best one I have showing the action wrench in the vise. The small center bolt is centering the action and is actually screwed into the action. The two big beefy bolts are what hold the receiver. They will be at 10 foot/pounds each. Again dear reader, don’t do what I did – remove the scope mount before putting it in the wrench.Here, you can see the tape. I was careful to snug the wrench’s bolts down evenly and that the receiver was sitting properly to not get damaged. I installed it this way to make it easier for me to get the headspace gages in and out.
Installing The Barrel
The barrel is simply badass. Sorry, I love a huge solid chunk of steel that is beautifully machined and finished. I’m just weird that way 🙂 The guys at X-Caliber did a great job for me. The make a barrel that is made for the Big Horn Origin, they have tons of barrel profiles and just a ton of options – click here for the Big Horn page. Seriously, the next time I do another full on custom build, I’m going back to X-Caliber for the barrel. They make just a ton of different barrels is what it boils down to.
So you can see the muzzle nut over the 5/8-24 threads, the Savage-style barrel nut and the Remington-style threads peeking out from under the green rubber thread protector. By the way, see the small black scope mount screws in the silver tray above? Yeah, their purpose hadn’t dawned on me yet 🙂
In case you are wondering about the exact specs of the barrel, here they are:
Model: Big Horn Pre-fit
Barrel Steel: 416R Stainless Steel
Barrel Length: 12″
Caliber: .308
Twist: 1:10
6 groove
Contour: #11 Marksmanship Training Unit (MTU)
Threads: 5/8″ x 24 TPI
Finish: Cerakote Graphite Black
Barrel Nut: 1-1/16″ x 20 TPI for Big Horn actions
The total was just under $500
Per the instructions in the Black Collar Arms video, I coated the threads that would go into the receiver with Anti-Seize and the thread where the barrel nut would go with Blue Loctite.Here’s the Clymer GO gage already in the bolt. I installed the barrel down tight and backed it off just a bit. Note how the recoil lug is in position as well. I carefully slid the barrel in through it. The pin seen at the 12 o’clock position helps keep it properly centered as you torque down the barrel.I confirmed both GO and NOGO before torguing down the barrel nut. You can see the recoil lug is now firmly in position as well.Building a precision rifle is not the time to go “Bubba tight”. The barrel nut needs to be torqued down to 55 foot-pounds and the barrel nut needs a 1-1/4″ crowsfoot wrench head to be tightened properly.Here are the two Clymer gages.Okay, so you do the headspace before the nut and after torquing it down. My first try at tightening the barrel nut didn’t work out because I didn’t have a good enough grip to keep the barrel from turning. The second try worked – I hit the torque spec and the headspace passed with GO (meaning the bolt fully closed) and NO-GO (meaning the bolt would not fully close). Black Collar recommended testing the bolt to make sure it would close on ammo. I normally do not keep live ammo on my bench just to be safe but I went and grabbed some S&B SPCE soft point hunting ammo and Federal T762TNB1 130 grain open tip match. The bolt closed firmly on both.
By the way, the Picatinny Rail held up just fine. I’m convinced it was a combination of the tape, setting it up carefully, relatively light torque load and a ton of luck that kept me from screwing it up. If you are planning one of these builds, just confirm whether the mount is integral or not and simplify your life 🙂
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I was surfing around on the web one day looking at interesting builds and ran across something I had never seen before – a Pork Sword pistol. It looked like a short barreled bolt gun on a chassis with a pistol brace, scope and can. What in the heck? So it sure made me curious and I searched on “Pork Sword”. It is totally a thing and I’m surprised it hasn’t caught on yet.
Turns out there is a company called Black Collar Arms that is making the parts and also producing rifles and pistols. What I had seen was a braced pistol based on a Remington 700-foot print receiver on their minimalist Pork Sword chassis with a short barrel. At this point, I was hooked. I like bolt guns and really like building unique stuff. They’ve posted quite a few photos of firearms they have built as well as customer guns – click here.
The concept behind the Pork Sword is simple – create a compact weapon in a caliber that packs a punch without needing to go the registered shot barreled receiver (SBR) rifle route by building a pistol with brace. A Pork Sword would be ideal for hog hunting, hunting in heavy brush, survival situations or even urban engagements. Because it uses a short action Remington 700 receiver, you have tons of caliber choices plus you can decide the barrel length – you can make a firearm that is tailored to your needs.
It had been years since I last owned a Remington 700 XCR LR and all I had done was swap the trigger and stock on it so I remembered very little about how they were made. Sure most bolt guns are similar but the Devil is in the details.
I called Black Collar Arms a couple of time and they were really cool and talked me through a lot of considerations. They offered to either build one for me or sell me the parts and I told them building was really my thing and so we had a great talk. I called them two times, talked to two different guys and they were really helpful — I definitely got good vibes from them.
The logo is awesome!! They charge extra to have it on the chassis and while I really like it, I opted to not have it engraved on my unit.
This build was going to be an investment so I didn’t want to screw up. On top of talking with them, I also did a lot of digging based on what the guys at Black Collar told me and what they had for sale. I then assembled a parts list and slowly started accumulating stuff for close to four agonizing months. I’m not a very patient guy so slowly getting the stuff was a new experience vs. jumping right in with both feet.
I probably researched this project more than most with lots of calls direct to vendors to better understand what they had to offer. My goal is a 1/4″ group at 100 yards and 1″ at 400. That would be about 1/4″ minute of angle (MOA) and is a mean feat. It requires that all the parts come together the right way – caliber selection, chassis, action, barrel, trigger, brake, etc.
If you plan to build a pistol start with a new receiver and not a rifle
From a NFA legality perspective, you are building a pistol so that means you must start with a receiver or pistol but absolutely not a rifle. Once a serial number is classified as a rifle it can’t be a pistol and would have to go the SBR (short barreled rifle) registration route. Again, if you plan on building a pistol and using a brace, start with an action/receiver or a barreled action but never with a rifle. If you do not understand what I am talking about then do not proceed until you understand the difference between a pistol build and what would require registration as a SBR prior to building.
Action/Receiver Comment
By the way, the chassis can use Remington 700 receivers as well as others that fit. That sounds odd but not all third party receivers that say they are “Remington 700 compatible” necessarily have the exact same footprint plus you are going to need a recoil lug. I went with a Big Horn Origin that has a Remmage type of barrel mount meaning you thread the barrel into the receiver and set the headspace and you then tighten down the barrel nut to lock it in place. It’s a slick method. Here are other potential action vendors to consider: Defiance, Alamo Precision Rifles, Surgeon, Impact Precision, Accuracy International, Gunwerks, Bighorn Arms, Pacific Tool and Gauge, Thompson Leh, BAT Machine, Impact Precision, GA Precision, Stiller, Kelbly’s, American Rifle Company, Badger Ordnance, Viper Actions, and Bergara. Again, confirm it will fit before you buy anything.
Big Horn Origin Short Action – This includes the scope rail and I bought this from Northland Shooter Supply (NSUS). Note, Big Horn’s name is changing to Zermatt Arms. I talked to Big Horn directly but bought it from NSUS in the hopes of getting it sooner. NSUS often has them in stock but I had about a 4-6 week wait until mine came in because they had run out of inventory and the owner was very up front with me that I might need to wait a while before I ordered.
X-Caliber Pre Fit Big Horn 12.5″ .308 MTU-profile Barrel with 5/8-24 threads – I bought this direct from X-Caliber when they were having a sale. I needed to talk to them because they have a ton of options and most of them I had no idea what to get so they were a huge help. Their lead times vary but I think it took about 3-4 weeks for them to send me the barrel.
TriggerTech Primary Trigger – These things are so sweet!! They drop right in and are very easy to adjust from 1.5 to 4 pounds of pull and are very crisp. I went with a black straight blade trigger purely out of preference. They offer flat/straight and curved triggers as well as colored black or stainless.
SB Tactical FS1913A Brace – These are relatively new braces from SB Tactical with a long strut, a folding mechanism and fairly stout arm brace assembly at the end. Please note the “A” in the model number I bought. The first version of this brace (FS1913 without the “A”) has a polymer strut that can flex. The FS1913A has an aluminum strut and is stiffer. Given my plans to shoot a .308, I definitely wanted stiffer. You may need to shop a bit – I bought mine from Natchez. If the price is under $199, it’s probably the polymer unit. If you are going with a lighter recoiling round, the polymer ought to be fine.
Ergo Tactical Deluxe Zero Angle Grip – I’ve always liked target stocks with near vertical grips so I opted for this model.
APA Little Bastard brake – this is a tunable brake for precision rifles. I will get a suppressor down the road but for now, I’ll run this brake.
Magpul AFG – Normally I am not a huge fan of angled fore grips but think I may want something to hold on to. I’m really not sure if I will keep it on the rifle long-term but we’ll see.
Magpul bipod – I dismissed this bipod when I first heard about it but guys reported liking it so I figured I better check it out. I bought the Picatinny rail version so I could remove it readily. In hindsight I should have bought the one that was ARMS lever ready but that is a topic for another post. There are a ton of color and options combinations you can consider. As you can see in the photo at the top of the page, I went with black and I did use a small section of Magpul M-Lok aluminum rail to mount it.
AD Recon SL 30mm Scope mount – I like quality quick detach scope mounts. There are two big differences between a quality mount like an ADM and a cheap one. First, when you remove the optic and mount from the rifle and then re-attach them, the zero holds true for a good mount and not a cheap one. Second, the cheap ones tend to wear and bend on the throw lever cams and plates over time and then the accuracy gets worse.
Vortex 4-16×44 HST MRAD scope – I am a huge fan of Vortex scopes and thing you get a lot of quality glass at a reasonable price. I opted for a medium physical size scope. My first choice would have been a PST Gen 2 5-25×50 but I couldn’t quite swing it right now. I may well change to this scope down the road.
Magpul PMAG 7.62×51 AC Magazines – the Pork Sword chassis uses the AC short action series of PMAG 7.62×51 magazines. I bought a couple of 5-round magazines and a couple of 10-round magazines.
Tools Needed
Wheeler Remington 700 Action Wrench – this holds the bolt action while you do the barrel work. I didn’t have one and it was definitely a worthwhile purchase.
Clymer .308 GO and NO-GO Headspace Gages – normally I use Manson out of habit. Clymer has a good reputation and one tip I was told long ago is to go with the same brand of gage for a given caliber. So I went with Clymer for both the GO and NO-GO gages because they were in stock.
Wheeler Professional Laser Bore Sighter – I’ve been using a green laser model for about a year now and really like it. The green is very visible further away but they also have a red laser model at a lower price if you aren’t interested in paying extra for the green laser.
The following tools aren’t firearm specific but will help with the build:
1-1/4″ Crowfoot Wrench – you’ll need this to torque the barrel nut to spec. Confirm the size you need with the barrel maker. I didn’t have one this size and needed to buy it.
1/2″ Torque Wrench – Get one that starts at 10 foot/lbs and goes at 100. That gives you a really versatile range. The action wrench bolts are 10 foot/pounds each and then we you bring the barrel nut down, it’s 50-55 foot/pounds.
1/4″ Torquing Screwdriver – Get a good one. I highly recommend the Vortex Optics unit because it is a precision tool for the optics work but it does max out at 50 inch-pounds and the action screws need 55-65 inch/pounds (note that is inch/pounds and not foot/pounds).
1/4″ Torque Wrench – I used a clicker-style torque wrench for the action screws that I installed at 60-in-pounds.
Vise – have a good enough one bolted to a surface that can hold the action wrench and your life will be way easier.
Blue Loctite – Firearms can shake just about any fastener loose so use Blue Loctite, or your favorite medium strength thread locker, to keep them from rattling loose.
SAE Allen Wrench Bits – If I recall right, all of the hex head screws were SAE and you’ll want the bits so you can torque them down to spec with the torquing screw driver.
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I’ve read a few guys asking about where to buy ammo so I did a quick dig on availability and assembled the below ammunition listings from my sponsors.
Also, so you are aware of what’s moving, I get a feed from Brownells of their current Top Sellers:
I hope this helps you out some.
If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@*********ps.com. Please note that for links to other websites, we are only paid if there is an affiliate program such as Avantlink, Impact, Amazon and eBay and only if you purchase something. If you’d like to directly donate to help fund our continued report, please visit our donations page.
The lighting was right, the leaves were on the ground and it was a great chance to get some new photos of my PTR 105 PDWR pistol. This big pistol is the interesting brain child of PTR. It’s essentially a cut down HK 91.
The PTR 105 configuration has a PTR metal handguard installed. After messing with it some, I decided to install an MP5 handguard as I like the angle on the MP5 handguard more. This also means I should have just bought the PTR 110 that comes with that handguard.
Now, the only problem is that the MP5 handguard is not as rigid as I would like. I’ll experiment some with different handguards in the future.
The PTR 195 and 110 are big pistols at 23.5″ overall, 8.5″ barrels and weigh about 8 pounds. I wanted to install a brace but needed to be mindful of Michigan’s odd 26″ maximum pistol length law. This isn’t legal advice, but my understanding is that the Michigan State Police say that a pistol with a brace is measured from one end to the other in the minimum operable condition. So, by installing a side folder, I could have a brace for when I wanted to use it but also had the minimum operable length at 23″. What you see in the photo is an SB Tactical BTFA folding mechanism, buffer tube and SOB stock. When open, the weapon measures 32.5″.
Thanks to the BTFA folding mechanism, I can swing the SOB brace to the left and it locks open. This keeps the brace out of the way of the ejection port. You can configure the BTFA to go either left or right.It definitely has clean lines.The PDWR definitely likes the PPU battle packs of .308 FMJBT 145 grain ammo. It works great and is plenty accurate within 100 yards. I’ll need to try and shoot the PDWR for accuracy some day and see what it can do.
As you can see, the brace is folded open and operating side of the PDWR is nice and clear of any obstructions.
Given the PDWR is chambered in .308 and uses 20 round HK G3 magazines, that is a lot of firepower in a small package. Overkill? Sure. Fun at the range? Absolutely.
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Plain and simple, it ran like a top. We did not have one single problem of any kind. We were running surplus aluminum mags from Robert RTG. The ammo was Prvi Partizan (PPU) .308 M80 145gr FMJ. I’ve had great luck with PPU ammo over the years and have run a variety of their calibers and loads. This .308 ammo comes in a heavy plastic sealed “battle pack” that SGAmmo sells. If you don’t know SG Ammo, they are a great ammo supplier that is a family run business. I buy most of my ammo from them and have nothing but good things to say about them.
We sighted the Vortex 1-6×24 Strike Eagle scope in at at about 25 yards and then just had fun. We weren’t shooting for accuracy but were having fun shooting “zombies” as we called them with the big Splatterburst 18×24 silhouette targets that I really like.
This time out, I was using my new Howard Leight electronic ear muffs. These are cool because they have directional sound amplification for normal sounds – like talking with your friends. When you shoot, they immediately cut the sound off and protect your ears. This is a real nice feature for me as I can’t hear a thing when I wear ear muffs due to my hearing loss and have to take them off to talk to someone. At any rate, these Howard Leights have a great reputation and I must say that I am very happy with them.
One of my brother-in-laws was wearing my new MPOW headphones and thought they did a really good job on cutting down the sound. These are a bargain price at Amazon and work way better than my old cheap Silencios in terms of hearing protection.
Now we did have a funny lesson learned – see how short the barrel is relative to the Caldwell front bag? Yeah, if you get the muzzle brake over that bag and fire, it will rain some kind of brown pebbles (corncob media maybe?) down on you as the muzzle blast shreds the top of the bag 🙂 I have to confess, I am the one who did it and had to use duct tape to seal the top up so we could use it the rest of the day.
The whole point of the range visit was for me any my two brother-in-laws to have fun and function test the PDWR. It performed admirably – neither of them are shooters and, for Jamie, this was his first time shooting anything – I think he did great.
Not one single problem – no feed issues, no ejection issues – it just performed great through about 200 rounds.
At any rate, I did learn a few things:
It upheld the good opinion I have of PTR firearms.
The SOB brace can handle .308 recoil just fine and lines the eye up for the scope great.
As expected, the Vortex scope was great.
The weight of the PDWR absorbs quite a bit of recoil making it a pleasant shooter but there is still recoil that moves you off target with any kind of rapid fire.
The muzzle brake does an okay job but I am going to check into alternatives to cut the recoil down further. The bird cage design is okay but there are definitely better designs out there. The PDWR has a 5/8″-24 TPI threading so there are definitely options.
The PDWR handguard moves forward and backward more than I care for. I am going to experiment on tightening it up or either moving to a DTAC handguard or back to the original PTR handguard. Note – the PDWR uses a MP5-style handguard.
Bottom line, I am very happy with the PDWR and plan to work with it some more on the above plus see how it does as I work my way back to 100 yards. Everything in this sessions was at 25 yards or less and I am curious how it performs as the distance grows. I would recommend the PDWR to anyone looking for a short HK91/G3-type roller lock for short distance use.
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The last step in preparation for my first trip to the range was to clean and lubricate the PTR PDWR. One thing I learned with my for PTR was that proper lubrication makes a world of difference and I could tell in working the PDWR that it definitely need lubricating so here’s what I did.
Also, if you need any parts diagrams or more detailed questions, be sure to read the HK G3 Armorer’s Manual.
In general, you know you need to lubricate all moving parts of the firearm such as the trigger and bolt. So let’s start with the trigger.
Lubricating the Trigger Pack:
I employ a very old rule of thumb – If it slides, grease it. If it rotates, oil it. That simple rule has helped me take care of a ton of rifles and pistols over the years and can help you too. [Click here for more on lubricating a firearm in general]
I used a small squeeze bottle filled with Mobil 1 Full Synthetic 5W-30 to reach in and lubricate all places where a part rotated on a pin. I then worked the various parts of the trigger pack to make sure the oil go to where it needed to go.I used Tetra Gun Grease to liberally coat the top of the hammer.
Lubricating the Bolt Assembly:
Now the HK bolt assembly is involved and the following is a diagram from the HK G3 Armorer’s Manual:
In short, I oiled all of the internals but did not fully disassemble the bolt. I put the assembly into a non-marring vise, twisted the bolt head off and then reached in with the squeeze bottle to lubricate the rollers, locking piece, firing pin, etc.
After that I applied a thin coat of Tetra Grease to the bolt carrier body and put more on the bottom and sides of the bolt where it would be making contact with the receiver and riding over the hammer.
Cleaned the Barrel:
One thing I always do before heading to the range is to clean the barrel. If you look down in most, you will see varying levels of crud ranging from oil to dust to stuff left over from machining. In the case of the PDWR, the barrel looked pretty good but I still wanted to clean it.
Over the years I have tried all kinds of different approaches to cleaning barrels. The fast and easy one I use now on non-precision firearms that just need a touch up is a bore snake. These things are caliber specific and give you everything you need in an “all in one approach”. I spray CLP on the snake and down the barrel then I drop the weighted cord down the barrel and pull the snake on through. I repeat this until the bore is shiny bright.
Note, there are a ton of brands including cheap generic imports. I’ve used Hoppes and Sage & Braker brands with no problems at all.
At this point the PDWR was ready for the range. The action felt and sounded good.
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Okay, when I received the PTR PDWR I did a quick inspection and noticed two small problems that needed fixing. I’m a bit disappointed that PTR quality control did not catch these two items but they are small issues.
First, the front sight blade was bent sideways – to canted, bent. I’m not sure how this happened but thankfully the HK-style hooded sight uses a sheet metal insert for the front post. The following illustration is from the HK G3 Armorer’s Manual:
I figured the easiest thing to try was to simply reach in with pliers with padded jaws and see if I could simply bend it to the right to straighten it. Out came my purple art pliers 🙂 I literally bought these things back in 2013 for some kind of work that required padded jaws. I don’t recall what and as odd as they look, they have held up to light use. My only complaint is that the nylon jaw covers can slide off under very much stress but that was not an issue here at all.
They actually fit perfectly and I was able to bend the sight post straight. Plan B would be to take a pair of needle nose pliers and slide rubber fuel line hose over the jaws. My one concern would be whether the relatively thin jaws could adequately support the post during bending. The art pliers below fit and did the job perfectly.
Fixing a Bur on the Cocking Lever Tube
The second problem I needed to fix was a steel bur on the tip of the cocking handle catch. It bugged me every time my hand hit it and should not have been there. Here it is in the next photo – sharp and pointing out.
In terms of the repair itself, first, I reached in with a Dremel using a small medium grit sanding drum and the tool on slow speed to knock down the sharp irregular edge from the inside. Take your time – remove a little and look. Your goal is always to remove as little material as possible. As the old saying goes, it is easier to take more off than try and put it back on 🙂
In the next photo, you can see the “point” has been sanded down but there is still material on the surface:
Next, I used a 120 grit small flap sander in my bench mounted rotary tool to sand down that lip. I could have used my Dremel but I use the little flap sander attachment so much that I routinely leave it in my bench tool.
Again, the trick is to go slow and take your time. After that, I used compressed air to blow out the tube and receiver and then used carb cleaner spray to “wash out” anything that might have stuck and blew it out one last time. The bur was gone and now it was on to lubricating the weapon.
(Note, that last photo above has the bolt back in when I was testing it later).
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