These days everyone builds their own AR and for good reason…its a ton of fun, can save you money and gives you good knowledge of how an AR works. One issue that many AR builders run into is finding compatibility issues with the parts they bought. With the popularity of ultra low profile handguards one of the most common issues is gas block incompatibility. Many handguards are so low profile that they can actually come in contact with the gas block itself or accessories attached to the handguard. I recently ran into this issue myself and figured I would share my experience with you.
One of my most recent builds is a DMR style rifle with a BSF Barrels 16″ barrel with a Carbon Fiber Shroud. Because of the carbon fiber shroud (designed to strengthen the barrel, reduce weight and help it vent heat) the gas block seat is .936″ so of course I just ordered any old .936″ low pro gas block.
Everything installed just fine, I slid the Cross Machine Tool UHPR Mod 2 handguard over the barrel, tightened it all down and … DUN DUN DUUUUN … the gas block was touching the bottom of the handguard. Not just close, literally touching. That’s called “unfreefloating” your barrel. 😂😂 This is something I verify every time I build a rifle as I’ve also seen MLOK screws touching gas blocks as well. Anything coming in contact with the gas block / barrel can and will effect accuracy even at just 100 yards.
In a basic beater build you might not care but in a build like this where accuracy is the goal, you have no other choice than to either swap out the gas block or swap out the handguard. Easiest and cheapest is to swap the gas block. Thankfully Cross Machine Tool has just released their new line of J.A.G. (Just A GasBlock) gas blocks which includes a .936 Gas Block specifically designed to fit under their UHPR handguards and many other super low profile handguards.
**One of the only things I actually do like about .936 gas block seats is that the .936″ opening of the gas block is usually big enough to remove without taking off the muzzle device**
While I had the gas block off I also decided to put a second dimple on the barrel so that the second set screw of the gas block would screw all the way in instead of sticking out just to make sure there was adequate clearance.
At this point it was time to reinstall the CMT handguard and check to see how it fit. Flipped it over and definitely good to go! The new Cross Machine Tool JAG .936 Gas Block did the trick and my barrel is now truly Free Floating.
Only thing left to do now is get this blaster to the range. I’ll have a full review of the BSF Barrels 16″ barrel coming soon. If you’re looking for an affordable low profile gas block you can’t go wrong with the new Cross Machine Tool JAG Gas Blocks.
Have you heard of Bootleg Builder Inc? You may not know who they are but I know you’ve seen their parts!! Bootleg Builder is a sister company to Primary Weapons Systems offering DI (Direct Impingement) models of many PWS components such as upper receivers, handguards, low profile gas block, charging handle, adjustable BCG, etc. Right now they are having a SUMMER SALE! All you need to do is head on over to their website and use the discount code SUMMER to get $50 off your purchase of $369.99 or more!
Memorial Day Savings Starts NOW!!! USE COUPON CODE “REMEMBER” DURING CHECKOUT TO SAVE 10% ON ALL CMT AR15/10 PRODUCTS THROUGH MONDAY 5-29-17!!
The Battle Arms Development BLACK FRIDAY SALE STARTS TODAY through Sunday, November 27th at 11:59pm PT. There are three different tiers to this sale. Basically, spend $100 or more and get a free BAD-ATG grip. If you spend over $200 you can choose to upgrade the freebie to a BAD-EPS-Ti (Titanium Takedown Pin Set) and if you spend over $300 you can upgrade to a free BAD-ASS ambi safety selector. These are not stackable, meaning you can’t get all 3. The more you spend the nicer the single free product is. Details and specific discount codes to use are listed below. Get in on this deal at www.BattleArmsDevelopment.com.
>$100 or more purchase in the Cart first, add any color BAD-ATG to cart and then enter code FREE-GRIP in the discount codes’ field – click “APPLY” before proceeding to checkout.
>$200 or more purchase in the Cart first, add BAD-EPS-Ti to cart and then enter code FREE-EPSTI in the discount codes’ field – click “APPLY” before proceeding to checkout.
>$300 or more purchase in the Cart first, add BAD-ASS to cart and then enter code FREE-BAD-ASS in the discount codes’ field – click “APPLY” before proceeding to checkout.
**One promo Code per purchase – Not Stackable!!** One promotional item per qualified purchase. While supplies last. **CODES will be valid only until November 27th, 2016 at 11:59pm PT – NO EXCEPTIONS** Happy Shopping!
SLR Rifleworks Labor Day Sale. 15% off all in-stock items and if you happen to spend over $350 you’ll also get Free Shipping. If its been a while since you’ve checked out the SLR website you’ll be amazed at how many products they offer now. AR15 and AR10 rails, 5.56, 7.62 and 9mm muzzle brakes, Gas Blocks, AK Parts, optic mounts, accessories, etc. Head on over to www.SLRRifleworks.com.
SLR Rifleworks Father’s Day Sale: Save 10% on all products on the SLR website and if you spend $350 or more you will get Free Shipping as well.
Get in on the savings at www.SLRRifleworks.com.
Griffin Armament continues to pump out the new products on a consistent basis. After the recent release of their new Griffin Armament AR Furniture Kit, Griffin Armament has just introduced their new PRIMO Gas Block. Its easy to underestimate the importance of a good gas block. The PRIMO Gas Block is an ultra high quality gas block with the ability to use the included set screws or you can go one step further and pin the gas block to the barrel for an bomb proof setup. Its also decently affordable so you don’t have to spend a ton more for a quality product.
The PRIMO Gas Block™ is a low profile billet machined, .750” ID block, made from 416R crucible alloy steel. The gas block has two provisions for mounting, set screws and / or pinning. The included splined pin allows qualified gunsmiths and experienced builders the option of having a military style secured gas block. A 1/8” carbide drill bit and three ton press are recommended for pinning. Knurl grip cup pointed fasteners ensure a secure attachment to host barrel.
– 416R Crucible Alloy
– QPQ Nitride finish
– .750″ gas block diameter compatible
– low profile design
– included splined pin
– Knurl grip – cup pointed fasteners
– inlcuded hex key
– Included gas tube roll pin
– Pre-drilled for ease of barrel pin installation
The new Griffin Armament PRIMO Gas Block has an MSRP of just $54.95 and is available now at www.GriffinArmament.com.
A few days ago SMOS Arms released a picture of some rails that were in the raw. SMOS Arms is well know for their slim rails that they have OEM’d for other well known companies. What’s cool about these rails they shared are that they are Quad Rails and they feature a modular cutout system. One is for an AR with a standard Front Sight Post or you can add in a small rail section at the top creating a smaller cutout to be used in conjunction with the Noveske Switch Block or possibly other adjustable gas block systems. There really aren’t a ton of details available for these new rails just yet but just wanted to share the sneak peek with you in case you didn’t see it yourself. Of course as with all prototypes, we’ll have to keep watching to see how product units come out.
SMOS Arms on Instagram
SMOS Arms on Facebook
V Seven Weapons just introduced an updated version of their Titanium Gas blocks. The new version is slightly lighter and looks a bit different. I’ve never used any of the V Seven Titanium Gas Blocks but everyone seems to really like them. They come with a life time warranty, made from Grade 5 Titanium with either a Satin finish or Ion Bond Black finish and can be purchased to fit a .625 or .750 size gas block seat. If you’re looking for a super lightweight gas block for your ultra light AR build, this looks like a great option.
For these Titanium Gas Blocks or other awesome lightweight products, check out www.VSevenWeaponSystems.com.
ODIN Works just announced they will be doing something pretty cool for those looking to build a 6.5 Grendel AR. Now when you purchase one of their 6.5 Grendel Barrels you will automatically get a free Nitride BCG and a Gas Block. This eliminates one of the headaches with building alternate caliber ARs which is finding a good BCG and Bolt to go with that caliber.
ODIN Works offers both an 18″ and 20″ 6.5 Grendel barrel. Their barrels are pretty well known for being very accurate while NOT being extremely expensive. If you are looking for a great jump start on your 6.5 Grendel build, this is it and at a great price. Take a look at www.ODINWorks.com.
KAK Industry has started their Labor Day Sale. Use the code “LABOR” at checkout of 10% off site wide. This includes BCGs, rails, uppers, muzzle devices, parts and accessories and barrels. Even the already discounted “contract overrun” barrels qualify for the 10% discount. GeT sOmE!!
Labor day sale starts …….NOW
use code “LABOR”.. good for 10 percent off sitewide.
one use per customer
not retroactive, please don’t ask
good till monday at midnight
Geissele Super Modular Rails have always been hard to find in-stock as they’ve had a hard time keeping up with the demand. Recently Geissele decided to fix that issue by narrowing their rail offerings down to just their most popular models allowing them to increase production of those specific models which are the SMR MK4 and SMR MK8 M-LOK rails. Here are some words from Bill Geissele himself.
A letter from Bill Geissele to the best customers a company could ask for.
Dear Loyal Customers,
In 2009 Geissele started making our Super Modular Rail (SMR) for the AR-15/M4 Carbine platform. Since then the SMR variants have been highly sought after and keeping up with the demand became almost impossible due to the complex 3D machining and large material removal from the aluminum semi-billet we start with. A year and a half ago we decided to meet this issue head on; we invested in equipment, people, and engineered new processes and procedures to manufacture our SMR’s on a larger scale without compromising quality. This allowed us to make more rails than ever before and more efficiently than ever before. The improved processes have allowed us to not only mass produce the highest quality, premium rail on the market. But, it also allowed us to dramatically reduce the cost, a cost savings that we have decided to pass along to you, our loyal customers. Today is the culmination of all of that hard work. Starting now, the SMR’s for the AR-15/M4 Carbine platform will be available in 7”, 9.5”, 13” and 15”. Each SMR will also feature M-LOK compatibility, and most importantly will start at just $200. On top of that, each SMR will include a low-profile Stainless Steel Super Gas Block (SGB), a $59 value and a value that can’t be beat.
I would like to personally thank each and every one of you for your business and support. We promise to continue to provide the highest quality premium products available.
For God & Country,
Probably the first thing you’ll notice and many AR builders will be excited about is the fact that you can now get Geissele SMR in shorter length rails. Many SBR / AR Pistol owners have wanted to put an SMR on their ARs but have been unable to until now. Geissele SMR MK4 and MK8 rails are now available starting at 7″ and 9.5″ and then increase to 13″ and 15″ giving you an option for just about any build or need.
Another new surprise is that all rails (with exception of the MK7) will come with a FREE Super Gas Block. For non-adjustable gas blocks this is probably my favorite. They give you the option to use just set screws as well as a channel to pin the gas block to the barrel. I have used quite a few of these Super Gas Blocks without a single issue.
If you’ve been looking to purchase a Geissele rail, there’s never been a better time than now. All options are in-stock, new sizes to choose from and get a FREE Stainless Super Gas Block. How can you beat that?! Check them out now at www.Geissele.com
Just wanted to give you guys a heads up that Radical Firearms has another sale going on. However, this one is quite a bit bigger than their usual sale which is why they are calling it their “Big As Texas” sale. They have everything you could possibly want on sale right now including complete AR’s, AR Pistols, Barrels, uppers, lowers, etc. All orders placed from now till Sunday will be entered into a drawing for a 24″ 6.5 Grendel complete rifle! Head on over to www.RadicalFirearms.com and get in on some of these deals.
All Radical Firearms orders this weekend (7/24 – 7/26) will be entered into a giveaway for this Radical Firearms 24″ 6.5 Grendel Rifle.
Just ran across KAK Industry’s Father’s Day Sale on their Facebook page and wanted to share with you guys. I run a lot of KAK Industry parts in my guns (BCG’s, Gas Blocks, Barrels, AR Pistol Buffer Tubes, etc) and love them. Here’s a rare chance to save a bit more when shopping with them. Use the code “DAD” at checkout and get 10% off your order of anything in-stock. You can only use it once though so make good use of it while you can. www.KAKIndustry.com
Shown in this picture is a KAK barrel, KAK Shockwave AR Pistol Buffer Tube and Blade
OK EVERYONE.. fathers day sale starts right now.. use code “DAD” 10 percent off anything in stock only one use per customer so make it count not retro active orders cannot be changed once placed so make sure its right before you click go.. expires sunday 6-21-15 at midnight thanks to all the great dads out there..enjoy… kurt