Tuesday, July 25, 2017

Upgrading the Ruger RPR Precision Rifle - Proof Research Paper City Timney Trigger

Upgrading the Ruger RPR Precision Rifle - Proof Research Paper City Timney Trigger

As we all know the Ruger Precision Rifle has become famous already for supreme accuracy right out of the box. It is a gun I have personally said requires nothing to go compete other than a great optic and bipod. Once we all find an incredible shooting platform like we have in the Savage, Remington, and now Ruger rifles we cannot help but start to tinker.

The handguard swapping is in theory easy and so is swapping the barrel, but there are some gotchas. All or at least most AR15 handguards will fit, but maybe not very well or they may look a little crappy due to the extra barrel nut offset. The barrel needs some finesse as well.

One of the advantages of the Ruger RPR is that the action is designed around an “easy” user changeable barrel system featuring a screw in barrel and headspace tensioning nut. Savage commercialized this in its actions and now Ruger has a somewhat similar version. 

The concept is simple, thread the barrel into the action until the bolt can close easily on a Gunsmithing Chamber “Go Gauge” and then tighten down the headspace locking nut. A check with a “No Go” gauge is done to assure the bolt cannot close and in theory the headspace is set, correct and locked in. Well that is theory with the Ruger anyway that barrel swaps are that simple… they are not if you do not have the right tools.

Other upgrades are the trigger and handguard. Swapping to a Timney or other aftermarket match grade trigger is super fast assuming you follow the Ruger trigger replacement video. The Samson handguard is technically an AR15 handguard, but there are some nuances to consider before you go all nuts making assumptions that “any AR15 handguard” will fit. Here is my story on what I went through to upgrade my Ruger Precision Rifle originally chambered in .308.

Timney was very nice to send me a trigger as a test upgrade which spiraled into “if I am going to do that then I should also do a barrel swap”. I have been interested in the 6.5mm Creedmore cartridge for some time and was intrigued that it used the same bolt face as the .308 which meant rebarreling a rifle could be technically easy. The reduced recoil benefits of the 6.5 Creedmore round were the most appealing. The 6.5 Creedmore feels infinitely more comfortable to shoot. We all know the ballistics and reach are better than the .308 while still delivering all the punch. I was extremely reluctant to start inventorying and reloading yet another caliber, however I am extremely pleased with the decision.

Some discussion with Proof Research on their heavily raved barrels led me to ordering a Ruger Precision pre-fit  24” 6.5 Creedmoor barrel. Premium match barrels are not cheap with many priced over $1000. The Proof Research has two versions of Ruger Precision Rifle pre-fit barrels - all stainless $485 and the carbon fiber barrels at $940. Essentially theses are the same precision match barrels, but the carbon fiber barrels have been machined down in key areas and then composite carbon fiber fills those voided areas. Despite what many believe, carbon fiber offers huge advantages over other materials beyond just a “cool look”.

The Proof Research carbon fiber barrel is a lighter, stiffer, more accurate barrel that runs cooler with longer service life all while increasing accuracy. Heat does a lot of bad stuff to a barrel. It increases wear, adds a heat distortion variable which makes shots wander after a string of shots, and even can add a heat mirage in front of optics. Aluminum conducts/absorbs heat about 100x better than steel, but carbon fiber dissipates heat at least twice as fast as aluminum (used widely on heat sinks) which means it gets the heat away from the barrel better than aluminum and far better than an all steel barrel. As we noted before a cooler barrel is better when it comes to accuracy and longevity of a barrel.

I believe in the science of what carbon and graphite can offer in barrel technology, I have a number of carbon based barrels ranging from Ruger 10/22 .22LR, AR15, and of course this build. The science works and all these barrels are among my most accurate rifles.

Proof Research barrels are pristinely made with machining, crowns, and stunning quality in every aspect. Getting this gorgeous barrel onto the Ruger was another adventure altogether.

Stripping off the RPR lower was quick as was the Sampson handguard, the standard AR15 barrel nut holding the handguard on did require a little a little muscle, and the headspace nut lock was removed with just a hex wrench, but then the theory of an easy upgrade went out the window.

The next immovable object was the headspace nut which only needs to turn about an 1/8th of a turn, but apparently Ruger has hired Thor and then equipped him with a four foot barrel nut wrench to secure these.  After some reading of many similar upgrade issues, I took the advice and ordered a $40 Brownells barrel vise jaw set and a specifically a $80 Magpul AR15 barrel nut armorer wrench. Without this combo plus a heavily secured table vise, I dare say you will never get the headspace nut to move without significant damage to the barrel, receiver, and/or yourself.

Although the headspace nut is technically AR15 toothed, the RPR barrel is also just wide enough than most AR15 wrenches will not fit around the barrel. So the wide mouthed design of the Magpul AR15 armorer's wrench is required. The Magpul wrench design also has a design which really locks onto the teeth and does not slip off “as much” as other armorer wrench designs.

I placed some sandpaper inside the Brownells barrel vise jaws, rough side out, slide in the barrel, and locked it down in the vise. I literally hung, all 240-lbs of me, off that wrench and the nut did not budge… that is until heated the receiver a little with the torch and I started whacking the end of the wrench with a 3-lb hand sledge. About six good hard whacks later and the nut gave way and the barrel unscrewed from the action effortlessly. If I had the right tools initially, it would have been a thirty minute upgrade. Reverse the process, thread in the proof barrel, headspace the barrel with the Go Gauge, tighten the headspace nut, recheck with all the Go and No-Go Gauges and reassemble.

The Timney trigger upgrade was an easy two minute ordeal assuming you release the trigger tension and lift the trigger locking block as shown in the Ruger Precision Rifle Trigger Replacement video. I would say the RPR factory trigger is very good, but the Timney is phenomenal and well worth the upgrade.

Swapping to a different “AR15 Compatible” handguard can be problematic on the RPR. Because the AR15 barrel nut only can snuggle up to within about ¼” of the receiver, most handguards will leave and ugly gap between the handguard and the RPR receiver. The Samson very unique handguard design slides back and forth on their barrel nut collars all the way against the receiver. I personally love Sampson handguards but wanted something different for this build.

I discovered that Paper City Firearms has a spectacular looking MLOK handguard which is specifically designed for the Ruger RPR - meaning is mounts up perfectly to the RPR receiver without any ugly gap and provides a seamless look. 

The Paper City Firearms handguard is an amazing high quality 3D machined handguard which offers a slim profile and MLOK compatibility paired with a extremely comfortable finger groove design. Paper City has also added an extended picatinny rail at the receiver and also another picatinny section at the and of the handguard - all nice touches.

Catalyst Arms just introduced a rather awesome little upgrade to the RPR. The Catalyst Arms billet aluminum RPR Magazine Release Extension is available in multiple colors bolts right up into the factory slot on the Ruger magazine release via on machine screw. There is no need to disassembly and this part could literally be considered a field upgrade. I was just about ready to start disassembly when I realized that this simple little $30 Mag Extension only requires one hex wrench and about one minute upgrade time. Cool little add on that delivers a more positive and faster mag release.

The beautifully clear Nikon Monarch 7 4-16 is held by a stunning set of Seekins Precision scope rings. These are no ordinary rings - every component is critical on a precision rifle and these rings deliver precision. The Seekins ring set is made from 7075-T6 aluminum, are matched serialized sets, with a center recoil lug machined in place, and top and grade 8 T25 torx screws. If you want a repeatable high precision return-to-zero set of rings these premium $130 Seekins rings will deliver strength and precision in abundance.

The 6.5 Creedmor does not have the recoil of the .308, but in order to take every bit of recoil out of the round, a Primary Weapons Systems PWS PRC brake was used. This is not a quiet break, but it feels like it reduces recoil by at least 50% of the already lighter recoiling 6.5 CM round.

Despite all the little issues and challenges, this is still a far easier process of rebarreling than on a Remington 700, since you do not need to worry about potentially turning the barrel on a lathe, cutting the chamber or any other Remington 700  blueprinting machinist based requirements. With $100 worth of specific tools, a shop vise, hammer, GO/No-Go Gauges, Dremel, and potentially a torch, the entire process is actually pretty easy and quick. Most importantly, you can do the upgrade and back and forth caliber swaps all at home without sending your rifle someplace else. Assuming the new Proof Research barrel does not lock up the headspace nut like the factory Ruger did, this could be a pretty fast barrel swap rifle. The Ruger is a very accurate factory gun, but it can be far better with just two upgrades.

The Timney trigger delivers a trigger feel significantly better than the factory Ruger - with a better trigger alone you will get better groups. I have tested the factory barreled Ruger RPR chambered in .308, .243, 6.5CM, and even the new .223/5.56 model. All are capable of ½-inch 100-yard groups with top end match grade ammo and finely tuned reloads. The Proof Research 6.5 CM barrel and Timney trigger upgrade cut those groups roughly in half with much more consistency in delivering tight groups even though many strings of quick fired shots. Our best groups were easily into the 100-yard ¼-inch range, but our testers felt that those best of day groups could easily become standard group averages with well tuned hand loads.

Surprisingly the upgraded Paper City Firearms did provide much improved handling of the RPR all while adding MLOK compatibility and accessory mounting to the handguard in the process. Look for more Paper City Firearms articles to follow because they also offer all this handguard greatness in AR15 formats as well. The Catalyst Arms mag extension is highly recommended for any RPR owner for only a $30 upgrade.

The science and barrel technology is really what you are paying for with Proof Research barrels. Yes there are some great barrels out there, but without the technology and science of getting the heat away from the barrel, these competing barrels are all fighting the same heat problems. The Proof Research barrels change the game. Honestly this upgrade is so good, I want to buy another Ruger Precision Rifle and rebarrel it with a .308 Proof Research barrel.

Worth the upgrade? As an owner of an FN SPR A3G, a $3500 factory rifle certified and guaranteed to shoot at least ½” 100 yards groups or better, I can say that a $2800 upgraded Ruger is a hell-of-a deal. For the shooter than wants the absolutely best, this is a hard bargain to pass up. A $1500 rifle with $1300 in upgrades that shoots like a $3500+ custom rifle seems like a great deal to me.


Check BROWNELLS for the best deals on firearms and accessories

Paper City Firearms - https://www.papercityfirearms.com
Catalyst Arms  - https://www.catalystarms.com
Primary Weapons Systems - https://primaryweapons.com
Seekins Precision - http://www.seekinsprecision.com
Nikon Sport Optics - http://www.nikonsportoptics.com

Monday, July 17, 2017

Century Arms RAS47 AKM AK-47 Rifle Review

Century Arms RAS47 AKM AK-47 Rifle Review

I reviewed the first Century International Arms American made C39 Centurion rifle when it was first introduced and I loved it. Featuring a billet ordnance grade steel receiver, that original V1 C39 with a has been the base for many upgrades and reviews and along the way has been a perfectly reliable AK47. It looks like hell at this point, but just keep working. Century International Arms then offered a C39V2 model which offer a 100% US made AK47 with all the nice little touches you would expect from a gentleman's AK47. Stunning glossy blued finish and beautiful wooden stocks.  Century Arms expended that billet ordnance steel line offering then with Magpul Zuhkov furniture and now is offering a lighter 100% American model with stamped receiver dubbed the RAS47.

This Century Arms RAS47 delivers another 100% American made and 100% based American parts rifle with the upgraded trigger, muzzle brake, and Magpul Zuhkoz furniture but now in a stamped 16-gauge 4140 steel shot folded steel receiver. This model is nearly a pound lighter than the billet ordnance steel receiver model and includes a standard side optic mount for an optional optics mount. The Century Arms RAS47 is a classic high quality updated AK-47 which has been termed the AKM. If you see an AK-47 style gun labeled AKM, it should indicate that it has been upgraded/updated from the older original specs.

Where the Century Arms RAS47 is different is that this rifle really does offer a true set of upgraded components. This is not your typical set of dubious parts from around the globe and then just assembled in the US AK-47, instead this rifle is completely made from all US made components and then assembled here in the US. Having owned and sold a few no-name AKs with dubiously sourced parts, I will state that there can be a huge quality, reliability, and accuracy difference between a high quality US made AK and the internally sourced models. With the RAS47, you know that you are getting top quality.  

Beyond the quality, the insanely comfortable Magpul Zukov furniture, and included side optics mount, Century Arms has carried forward their exceptionally great RAK-1 enhanced trigger group. Where my heavy billet V1 C39 makes a great scout rifle, this Century Arms RAS47 stamped receiver is exactly what I want for a red-dot equipped AKM - updated AK-47.

The RAS47 features 4150 chrome moly steel with nitride finish.  The nitriding also delivers the look and feel of a higher end barrel finish. Other new features are the T-paddle extended magazine release, a Magpul AK Mag, bolt hold open safety, enhanced dust cover, and lightened bolt carrier assembly for improved performance. 

The included RAK1 "enhanced trigger" is the closest thing to a match trigger for AK47 on the market. The trigger is worlds better than the triggers typically found on AK's.

The remaining internals and sights on the rifle remain unchanged from the previous US made C39 rifles. The removable and effective Century slant compensator remains as do the standard adjustable AK front sight pin and rear sight are fully windage and elevation adjustable from 100 to 800 yards.

I had no issues throughout testing from a function perspective. A side Aimpoint T-1 Micro red dot format optics mount was also included for my review. I tested several different red dots and also the return-to-zero capability after removal and I am very impressed with the robust time tested design and return-to-zero reliability. I settled on a Vortex Sparc which I had a screw-in 3X multiplier. This delivers both a fast red dot and the option for a little more precision for longer shots. My only complaint is that currently I am not aware of other compatible side optics picatinny mounts fro the C39/RAS47 format optics side mount. Centry has mutliple bolt mount points on the top of the side mount rail, but I have not found any compatible rails mounts to provide the flexibility to swap between a magnified optic or a red-dot.

When it comes to high end ammo, Hornady has a pretty nice selection. Like the C39 series tested previously, my best groups were from the Hornady Zombie Max ammo which is very close to Hornady’s top grade 7.62x39 steel cased ammo.  With the regular $6 a box Herters/Tula/Wolf ammo I saw around 4” groups at 100 yards off the rest with iron sights. However with the Hornady rounds my best group was in the 1.5” range at 100 yards. This gun gets the job done and and as expected with any AK it is not a tack-driver.

The Century Arms AK-47 line has been a great set of rifles which have see a lot of use my me with training, plinking, and even hunting. Consider that the 7.62x39 has just a bit more umph than the time proven 30-30 whitetail and hog round and you can easily consider slipping in a 5-round magazine for hunting all in a rifle package design which has been already time tested to take a huge beating. With the exception of my Henry lever action, this is my favorite gun for quick stalking based hunts where shots are unlikely beyond 150 yards.

This new RAK47 model offers AK-47 aficionados a very well appointed, light, and nice looking firearm option with some well thought out refinements and performance upgrades which also add to the cosmetic quality feel of the rifle. What I like about the Century Arms RAS47 is that they have put a 100% made AKM/AK-47 all together into an extremely well appointed and light rifle which is ready for anything.

Caliber: 7.62x39mm
Action: Semi-automatic
Capacity: 30+1
Barrel length: 16.5"
Barrel material: 4150 chrome moly steel with nitride finish
Barrel twist: 1:10"
Stock: Magpul® Zhukov-S
Receiver: Stamped 1/16" 4140 steel with nitride finish
Pistol grip: Magpul® MOE
Sights (front/rear): AKM standard
Handguard: Magpul® Zhukov
Flash hider: Slant
Overall folded length: 25.25"
Overall deployed length: 34.75"-37.25"
Overall weight: 7.22 lbs.
Model Number: R12405N
100% Made entirely in the USA from only USA-made parts
MSRP $799
Street Price:  $740

Check BROWNELLS for the best deals on firearms and accessories

Century Arms - www.centuryarms.com

Thursday, July 6, 2017

Building a $4500 Proof AR15 SBR Beyond Elite that Odin would Call BAD ASS

Building a $4500 Proof AR15 SBR Beyond Elite that Odin would Call BAD ASS

As the oddly worded title hinted, this is a top tier Short Barreled Rifle built on a Battle Arms Development receiver set using Proof Research Carbon fiber barrel, Bushnell Elite optic, and Odin forend. This is likely my most expensive build to date and the reality is the price still could have very easy to pushed higher.

The primary reason for SBRs continued popularity is that they deliver everything we want without any compromises in a short barreled AR15, in a format without configuration restrictions, and without the legal confusion associated with accidentally shouldering an AR15 brace equipped pistol. For this build I wanted a SBR which represented everything I love about SBRs, short, accurate, and fun all in a build which would showcase the cutting edge of components. This all out customized Battle Arms Development PDW lower with monolithically integrated VERT stock

Due to budget constraints of the first version of this build which totaled $900 lower + $200 tax stamp + $240 Geissele Super Dynamic trigger for the lower build alone, I had to wait to build the tier of custom upper I wanted. Sure the upper I featured in the initial review was still drool worthy and hardly low grade by any means featuring a stainless Ballistic Advantage Hansen barrel, Bootleg upper and handguard, and Bushnell FFP AR optic. With the new upper, the current custom build is likely one of those most impressively expensive SBR builds anywhere at a cash register tipping $4567 MSRP.

Notably I did not pick out each of the components because they were expensive, but because they fit the purpose I wanted for the rifle - yes, I can look my wife in the eye and actually state this truefully. There are certainly much more expensive components and optics out there and even super custom Cerakote finishes. Adding an additional $2000 to the price could have been very easy.   Before jumping into each component, let’s run through the list of what is packed into this registered Short Barreled Rifle build:
ATF - $200 SBR tax stamp
BAD-PDW VERT Lower Billet Receiver - $900
BAD-556LW - Upper Billet Receiver - $260
Geissele Super Dynamic trigger - $240
Proof Research 11.5-inch Carbon Fiber Barrel - $940
Odin Works O2 Lite MLOK - $190
JP Rifles Match Bolt Kit - $138
Faxon Nitrided Ultralight Carrier - $180
Geissele Charging Handle - $89
Aero Precision Scope Mount - $80
Bushnell Elite SMRS 1-6.5x24 - $1250
Innovative Industries Stainless Flash Hider - $30
V7 Titanium Ejection Port Door -$57
Stainless Gas tube - $15
Zero Hour Micro Lightweight Gas Block - $55
TOTAL - $4624 - Yeah, this build got out of hand

Battle Arms Development B.A.D- The engineering prowess of B.A.D is reflected in their receivers delivering lightweight with strength, but these are premium receivers which together cost about the same as your average high-end AR15. The BAD-PDW VERT Lower Receiver was previously reviewed so I will summarize the review. Despite the $900 price tag the receiver includes everything short of your favorite trigger group including grip, every upgraded part BAD offers and the integrated VERT stock monolithically integrated into the receiver complete with buffer and spring assembly… which is just freaking cool. Yes, the BAD selector, take down pins, bolt release, adjustable grip, and all the detents and springs are included. 

This remains the most expensive production AR15 lower receiver made, but you do get a lot of features for the money in addition to the killer looks. This receiver set is well integrated with all the included components which means everything actually looks like it all was designed together. BAD has even thought through how the stock collapses while still allowing full function of all the controls.

Of note, like many other super short buffer tube assembles, the VERT stock and included buffer system does require a bit more gas pressure to operate which can require enlarging the barrel gas port a little for reliable cycling. Both the original build with the Ballistic Advantage barrel and the Proof barrel required the barrel gas port to be enlarged slightly to work reliably with the integrated VERT stock.

The $260 BAD-556LW billet upper receiver is the mate to the lower and delivers an extremely light 6.28-ounce weight while increasing strength compared to a mil-spec forged receiver. The upper omits the forward assist to shave weight and actually beefs up other areas to increase strength. The receiver paired beautifully to the Oden forend delivering outstanding continuity of the lines without an ugly gaps.

Geissele - The Super Dynamic trigger has been superb and delivers the full accuracy potential of any barrel, but Geissele is becoming a company delivering more than just triggers. A beautifully machined Geissele Super Charging Handle was added to complete the look, compliment the lines of the upper and it happens to be a kick ass ambi-charging handle as well.

Proof Research - One of the really nice things on a registered AR15 SBR receiver is that you can swap out to any upper regardless of the barrel length. Sure those tiny little 7.5-inch barrels are small, but they are also deafeningly loud. The 10-12-inch range has become my favorite barrel size for AR15 pistols and SBRs. It delivers excellent accuracy at tolerable sound pressure levels and still a size that make a SBR maneuverable. Carbon fiber barrels have intrigued me for some time and Proof Research is really turning heads with the performance of their barrels which are offered for a variety of bolt actions, AR15 and AR10 format rifles.

Proof Research uses their own match grade blanks which are thinned/turned-down and then partially backfilled with a proprietary composite carbon fiber which delivers near instantaneous heat transfer - thus a less stressed cooler running barrel even when fired at high rates. This patented design delivers retains match grade accuracy which is unaffected by high rate sustained firing. The same group you get with a cool barrel is pretty much the same group you will get with a heavily fired barrel. Though the carbon fiber barrels may look cool, the cool factor is a byproduct of the structurally engineered lighter barrel.

This build was lucky enough to use a 11.5-inch special contract run of SBR barrels made for a government special operations contract.  Proof still stocks the $940 11.5-inch Carbon Fiber Barrels, however they may be a limited release item. The concept was a short barrel which could provide top tier full barrel length accuracy even when suppressed. Based on the tiny little groups I am seeing downrange, I believe Proof exceeded that requirement.  It is important to note that Proof Research barrels are not necessarily lighter and in most cases I have found them to be about the same weight  as a comparable profile steel or stainless barrel. The advantage is the heat wicking property that keeps the barrel and groups from moving around as the barrel heats up - The voodoo works.

Odin Works - At this year’s SHOT show, I spied the insanely ultralight O2 Lite MLOK ODIN Works forend. The engineers have worked their magic to lighten the forend down as much as possible without compromising strength. The featured 9.5-inch 4.81-ounce handguard seemed like it was going to float off the workbench. The mounting hardware and barrel nut add another 2.7-ounces. If you have not looked at the detail Odin is putting into their products, you are missing out on a top tier brand. Even the included MLOK rails have stainless connectors…. just amazing detail. This is a beautiful open design MLOK compatible forend that delivers ergonomics and a full view of the stunning carbon fiber Proof barrel.

JP Rifles EnhancedBolt Match Bolt Kit - A top tier bolt makes all the difference in the world in accuracy and one of the top bolts delivering extremely consistent specs has been the JP Rifle EnhancedBolt. JP Rifles also offers this in a kit including a firing pin, cam pin, bolt, and retaining pin. This is a kit used in nearly every high accuracy AR15 build I have built. The bolt is fully AR15 compatible made from more durable SAE 9310 with improved lug geometry for reduced wear and easier locking/unlocking plus enhanced ejectors, extractors, and gas rings. Remember Mil-Spec is not a spec, but a spec range and JP delivers a bolt which is on the tighter tolerance of the range which means a more solid lock-up and ultimately tighter groups.

Faxon - As noted there is a need for higher gas pressure to cycle the short VERT buffer assembly and one way to increase the recoil the buffer sees is to use a ultra-light carrier. I have used the ultralight Faxon carrier in other builds and liked that it minimized the weight of this build, helped meet cycling requirements, and it paired nicely with with the JP EnhancedBolt.

Aero Precision - The AP ultra-light scope mount is probably the number one mount I recommend to everyone. These are phenomenally consistent, super light weight, beautifully made, hold zero when they are removed and remounted, look like they are monolithically integrated into any upper, and are only $80. Sure I could have chosen an optics mount twice the price, but for this build the trim lines and light weight of the AP scope mount made perfect sense.

Bushnell - The first version of this build featured a $250 Bushnell AR 1-4 FFP which is a nice optic, but represents the entry level of Bushnell’s low power AR optic line. The $1250 Elite SMRS 1-6.5x24 is the other extreme and is the top end of Bushnell’s Elite line… well technically they just introduced a 1-8 SMRS now, but it was not available at the point of this article.

The Elite Tactical SMRS (Short Mid-Range Rifle 1-6.5x24mm Scope) was designed with input from 3-Gun, military and LEO experts to provide ease of use and unfailing reliability. The optic is a non-zooming mil-based second focal plane reticle with a folding zoom lever. What I really liked about this optic was the brilliant clarity and the illuminated BTR-2 reticle with mil-based ladder that does not lock the shooting into preset BDC drop. This has become my favorite lower power variable optic and in the process it keeps me working on my mil-based adjustments.  For a SBR which does have the ability to deliver tiny little groups, this optic perfectly delivers everything you could want in magnification from zero to 500 yards.

Innovative Industries - Over the years I have realized that those fancy brakes do a wonderful job of mitigating recoil and muzzle rise, but they are loud as hell. In a SBR with a short barrel you want quieter, not louder and one of the questest muzzle devices remains a A2 style flash hider. For a showier A2, the $30 Innovative Industries stainless flash hider is insanely well made. I have three of these installed on several build and could not be happier with the quality.

Miscellaneous Parts - Stainless gas tubes are durable and also be hand polished to a beautiful luster as was done on this build. The Zero Hour Micro was found during some searching for a super lightweight gas block. It is a well made lightweight design which I have found no issues from a durability perspective. It would not be my pick as a gas block for full auto, but it has been more than durable enough for spirited shooting on this semi-auto platform. I really did not need the gas adjustability of an adjustable gas block, but minimizing weight was a priority - for $55 the Zero Hour Micro has performed perfectly. The V Seven titanium ejection port door delivers a nice little touch that carries through the stainless bits into the rear of the receiver.

The final build is lightweight and probably total overkill for the intermittent predator hunting it is used for, but the gun has already received a lot of use as a trainer for tactical drills and a few rifle classes. There may still be a few tweaks here and there, however this is about everything I could dream of in an SBR and it is a worthy investment in a tax stamped NFA which I will never sell.


Check BROWNELLS for the best deals on firearms and accessories

Battle Arms Development - http://www.battlearmsdevelopment.com
V Seven - https://www.vsevenweaponsystems.com