Category Archives: AR15NEWS 9mm AR Build

If you’ve ever owned a Pistol Caliber AR you know very well that fine tuning them is all about the buffer system as most Pistol Caliber ARs are blowback so there is no gas block or gas tube at all to adjust. However, fine tuning them is a must. I was absolutely surprised by the amount of felt recoil the first time I shot my 9mm PCC. Pistol Caliber Carbines are known for breaking a Bolt Catch and increasing internal wear if you don’t figure out how to slow down the Bolt. Most people end up guessing and buying a heavy buffer of any number of ounces or will buy a number of them and try them all (that’s what I did LoL). Quarter Circle 10, the industry leader and standard for Pistol Caliber ARs, has just introduced their new Adjustable Pistol Buffer Assembly which looks like a real winner.

quarter-circle-10-adjustable-pistol-buffer-assembly

Adjustable Blowback Buffer Assembly for use with most pistol caliber carbines, suppressed or unsuppressed, including 9MM, .40 S&W and .45ACP. Quick change weight management allows use with multiple configurations.

Package Includes: 4 aluminum weights, 4 steel weights, 4 tungsten weights, 4 rubber spacers, buffer body and allen wrench.

quarter-circle-10-adjustable-pistol-buffer-assembly 2

  • 8620 Steel construction and QPQ nitrite finish for maximum wear and durability
  • Easy user adjustability from 5-11oz with included Aluminum, Steel, and Tungsten weights
  • Threaded retaining pin and included allen key eliminates need for hammer and punch
  • Extended length for increased bolt catch life (no spacer necessary)
  • Drop-in installation
  • For use in carbine length buffer tubes
  • Ideal for tuning your Pistol caliber AR for the best function, felt recoil, and sound suppression

 ***For pistol caliber blow back builds only

Whether you’re planning a new Pistol Caliber Carbine build or wanting to fine tune your existing PCC, this might be a great answer to the perfect running gun. Check them out at www.RainierArms.com.

Faxon Firearms has really been branching out lately into new arenas but this one came as a surprise. The new Faxon Firearms AR9 BCG is for the super popular Pistol Caliber Carbines. Instead of choosing between Glock mag compatible or COLT mag compatible design, Faxon made this one so it will work with both. They’ve also made it a one piece design so the key is machined in instead of bolted on, it has a full auto carrier shape and a Black Nitride finish. 

Faxon Firearms AR9 COLT Glock Bolt 1Faxon Firearms AR9 COLT Glock Bolt 1Faxon Firearms AR9 COLT Glock Bolt 1

We just can’t help not accepting the status quo. Bolt carrier groups are available aplenty, but few could meet our exacting standards for performance and value. Seeing current offerings as just the starting point, we set out to ensure the best options are available for our demanding customers.

Improvements include cuts to ensure both Glock and Colt-style lower receiver compatibility. The key is machined directly into the bolt carrier – no fasteners to check or worry about. Finally, we keep the full-auto compatibility for use with new binary-style trigger systems.

DETAILED SPECIFICATIONS:

Carrier & Integrated Key:
– Compatibility: GLOCK & COLT – Style Lower Receivers
– Carrier: MIL-SPEC 8620 Steel Material
– Key: One-Piece Integrated Key
– Fully Heat Treated
– Forward Assist Serrations
– M16 (FULL-AUTO) Compatible
– QPQ – Salt Bath Nitrided

The new Faxon Firearms AR9 Glock & Colt lower compatible BCG is 1-2 weeks out but you can pre-order yours by emailing pat@faxonfirearms.com. More pictures and pricing available at www.FaxonFirearms.com.

While it seems like EVERYONE is building a 9mm AR right now, its taken AR component manufactures a little bit longer to jump on board as well. Thankfully Fortis Manufacturing has jumped in with a 9mm version of their extremely popular muzzle brake. What makes this such an awesome new product is not just that it looks pretty amazing but it also interfaces with the Fortis QD CONTROL blast shield (sold separately). This is sure to be a great performing muzzle device for your 9mm AR and is available in both 1/2×28 and 1/2×36 TPI which are the two most common thread patterns for 9mm AR barrels. Check out the information below, then head on over to www.FortisMfg.com and pick one up for yourself.

Fortis Mfg 9mm Muzzle Brake and CONTROL

The performance of the Fortis 556 Muzzle Brake is unmatched and the rise is non-existent, now replicated for your 9MM AR needs (also compatible with the Control Shield).

While the trend of 9MM AR’s continue to rise, we wanted to give those enthusiasts a product that carried the Fortis theme of design and functionality. So we took the 556 Muzzle Brake and utilized its aesthetics while getting the same performance for the 9MM that we do in our 556.

Available only in Nitride, in 1/2×28 and 1/2×36 TPI, now available for purchase on FortisMFG.com.

New Frontier Armory is always pumping out awesome new products so it was no surprise to see their new Extra Heavy Blowback 8-Ounce Buffer pop up on their Facebook page. You might be asking…”What is a Blowback Buffer and why does it need to weigh a whopping 8-ounces?”. Well, it all has to do with Pistol Caliber AR’s. 

Instead of using a gas system like a Direct Impingement AR to cycle the weapon, most Pistol Caliber AR’s (9mm, .40, .357 Sig, .45, etc) all use Blowback Operation. With a Blowback system their is a ton of energy throwing that BCG back and unless you do something to slow it down, it creates more felt recoil and it can tear things apart or cause excess wear. With Blowback ARs there is no Gas Block to adjust so your only option is to adjust the buffer weight. In comes the Extra Heavy 8-ounce Blowback Buffer from New Frontier Armory. 

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In my personal 9mm build I am running a 5.3 ounce H3 buffer. There is still more felt recoil than there needs to be but there aren’t too many buffer options out there that weigh more than the H3 buffer. NFA’s 8oz Blowback Buffer is made of solid Stainless Steel with an overall length of 4″ and would be a great next step in slowing down the BCG so its not slamming back so hard. It’s priced right too at just $39.99.

So, if you’re looking to smooth out your Pistol Caliber AR, the The New Frontier Armory Extra Heavy 8oz Blowback Buffer is definitely an option to look into. You can check them out at www.NewFrontierArmory.com.

If you’ve been wanting to start a pistol caliber AR build there’s not better time than right now. Quarter Circle 10 just sprung a surprise sale for Christmas and its one you need to jump on for sure. Starting right now (12/23/15) and running through Saturday 12/26/15, purchase any Quarter Circle 10 lower receiver and a Quarter Circle 10 t-shirt and you will save 30% off. I recently built one of my favorite ARs using a Quarter Circle 10 lower, barrel and BCG which is shown below. I was told you were bad this year and Santa isn’t bringing you anything so take matters into your own hands and get something nice for yourself!  

www.QuarterCircle10.com

Quarter Circle 10 Christmas Sale

Many of you guys have been following along with my new 9mm AR build and noticed that their 9mm barrels were out of stock for a bit. Good news for those looking to start their 9mm build, they are officially fully restocked. They currently have 3.5″, 5.5″, 7.5″, 10.5″, 14.5″ and 16″ barrels ready to go. Most guys go for the shorter barrels because “Its a pistol caliber” but I’ve seen 100 yard groupings on paper with a 16″ 9mm QC10 barrel that were 1MOA which is pretty impressive. If you’re looking to start that next 9mm build, head on over and snag a barrel or two from QC10.  

www.QuarterCircle10.com

Quarter Circle 10 9mm barrels

Quarter Circle 10 9mm AR

For a few years now, I have wanted to build a 9mm AR that takes Glock magazines. Mainly because the handgun I carry every day is a Glock 19. About a month ago I finally built my 9mm AR and it has been awesome. From the first round down the pipe it has run like a sewing machine with zero failures and the bolt hold open on last round is even working. Since then I have had a ton of questions asking me what specific parts I used in my build so I wanted to put all of the details together in on place for people to see and get information from. Once I have had a chance to put a ton more round through it I will follow up with a review as well.

QC10 9mm Build 0

My build started with Quarter Circle 10. They seem to be leading the pack in innovation regarding pistol caliber AR’s. They offer a Glock Small Frame lower for 9mm, 40SW, 357Sig, a Glock Large Frame lower for 45ACP and 10mm and a Colt 9mm lower as well as bolts and barrels for these as well. I wanted my AR to take the same mags as my Glock 19 so I went with the stripped Glock Small Frame 9mm Lower, 9mm BCG and 9mm 7.5″ barrel. Any AR-15 upper will do but I use a Rainier Arms mil spec forged upper minus forward assist. QC10 will be coming out with their own side charging upper with pistol caliber ejection port soon too. I also used an ALG Defense ACT trigger and need to upgrade to an ambi safety soon.

QC10 9mm Build 0

I covered the barrel with an SLR Rifleworks 8″ Solo Ultra Lite M-LOK rail. SLR rails are becoming one of my personal favorites. With such a short rail I decided to put an Arisaka Defense M-LOK Finger Stop underneath it. Its just small enough to not be in the way but big enough to keep your hand from getting too far forward. You may have noticed already but the QC10 barrels are straight blow back and do not require a Gas Tube or Gas Block.

QC10 9mm Build 2

QC10 9mm Build 2

For the muzzle device I chose the new 9mm Linear Comp from Kaw Valley Precision. I have used KVP’s Linear Comps for 300BLk and 5.56 before and the work great. Now they offer the same product in a 9mm version with a 1/2×28 thread pitch which is what I needed for the QC10 barrel. The fact that my barrel was shorter than my rail made the KVP linear comp a no brainer but it also looks sweet only sticking half way out the rail.

QC10 9mm Build 2

For my optic I chose a Vortex Optics RAZOR 3MOA red dot and mounted it to a Cross Machine Tool red dot sight mount. This is a nice light weight, compact optic setup that I feel has very fast target acquisition.

QC10 9mm Build 5

One item I recently installed was the Law Tactical Gen3 Folding Stock Adapter. At the moment I have this gun set up as an AR Pistol but will be converting it to a registered SBR with a stock soon. I love how compact the folding stock adapter makes this for transport. I can fit it in a small backpack, bag, case, etc without having to separate the upper and lower. It is quickly ready to shoot by flipping the buffer tube straight as you remove it from its concealment.

QC10 9mm Build 6

QC10 9mm Build 7

I was able to remove the extra weight at the rear of the carrier by removing the large roll pin and sliding it out. That is where the carrier extension for the Law Tactical Folding Stock Adapter goes.

QC10 9mm Build 7

The Law Tactical Gen3 Folding Stock Adapter has a lowered hinge to keep it away from your knuckles but just to be sure I am using a Fortis Manufacturing Hammer charging handle which has a really nice sized lever on it. The Hammer is one of my go to charging handles. Great build quality and affordable. 

QC10 9mm Build 7

Originally I started out with a standard carbine buffer spring and carbine buffer combo. It worked just fine but the guys at QC10 told me they recommend a heavier buffer, somewhere in the 5-6 ounce range to slow the carrier down a bit. I installed a Damage Industries 5.4 ounce H3 buffer and it continues to run perfect. 

QC10 9mm Build 7

Aside from a custom mag release and bolt catch assembly, the QC10 lower takes normal mil spec parts kits. You can see the Bolt Catch itself is mil spec but it is actuated by a pre-installed lever that contacts the magazine follower. This tends to be an issue with some mags as the spring pressure isn’t always strong enough to press the lever up and activate the bolt catch. This can be remedied by installing Wolf High Power springs inside the magazine. I bought a couple of SGM Tactical 33rd magazines from AIM Surplus and they seem to have better springs than the OEM ones. So far they are activating the LRBHO (last round bolt hold open) every time. 

QC10 9mm Build 7

So, there you have it. That’s pretty much my build in a nut shell. As I always tell people who are intimidated with building their own AR, “Its easier than you think”. You’ll love the increased range and accuracy you get out of a 9mm AR and being able to carry one type of mags to feed both your Primary and Secondary is awesome. Let me know if you guys have any questions or comments.

QC10 9mm Build 7