Guntec 9mm Bolt Carrier Group

 I was in the process of putting together a pistol caliber carbine or PCC for short. So of course I needed a bolt. I contacted GunTec USA since they had recently come out with a 9mm bolt. They were kind enough to send one out for review, along with a 9mm compensator for the same build. I have reviewed other GunTec products in the past with good results.

 This review will probably be on the shorter side, after all it is a bolt carrier group (BCG). The GunTec 9mm BCG has a very nice QPQ Nitride finish. This makes cleaning a little easier than a standard run of the mill Mil-Spec BCG, plus it looks nice. Another function of the Nitride finish is it’s smoothness, if that’s a word. When I installed the GunTec BCG, it cycled very smoothly. This could also be due to the fact that the exterior machining on the bolt is top notch.

 The GunTec bolt has pretty much all the features one would need for this type of BCG. It has a roll pinned in weight to add mass. This makes it possible to run a standard weight buffer in your recoil system. The bolt is heavy at almost 15 ounces, but this is needed for the straight blowback style action used in most 9mm PCC’s. I did run into a small problem that was probably my OCD. Where the gas key block is located, right behind it on the bolt, was a little raised area. When I cycled the upper by hand, you could feel it drag against the buffer tube, but only right at full extension of the charging handle. It however did not cause any wear or problems during use. I smoothed them out so I felt better. Other than my OCD, the bolt has ran flawlessly using the Stern Defense mag block and all different types of glock magazines. The gas key bolts are staked in. They could be a little more, but since it is really only there to manually cycle the firearm, I didn’t pay much attention to them. The BCG also uses an external extractor. A big plus if you actually shoot enough to wear it out.

You can see here where I polished off the small lip.

Same lip on bottom of bolt. Neither top or bottom lip actually affected function.

 I am not sure how many round that I have out through the BCG. But it has not failed me so far. I would estimate around 700-800 round through it at the time of this review. I have ran it with three different AR15 triggers. A mil-spec, a KE arms, and a Velocity. All worked well. The Velocity was on the light side of the trigger pull weight, so I took it out and am currently running the KE arms trigger with good luck.

 If you are in the market to assemble a pistol caliber carbine, take a look at GunTec. PCC’s are an economical way to practice. This 9mm BCG will do both styles of receivers. It has given me no problems and is made right here in the U.S.A. Go take a look at GunTec USA, they probably have everything needed for a PCC.


Firearms Insider Reviews - 8 Key Points

Claim to Fame:

9mm AR bolt for Glock or Colt style magazines

Target Market:

Those building a pistol caliber carbine

FNBs (Features & Benefits of this product):

  • Compatible With Glock & Colt Style Lower Receivers

  • MIL-SPEC 8620 Steel

  • External Extractor

  • Dust Cover Compatible

  • Total Weight : 14.9 Ounces

  • USA Made

  • Fully Heat Treated

  • QPQ Salt Bath Nitride Finish

  • 1 Year Warranty

What other aesthetic options or finishes are available?

In Nickel Boron

What others are saying?:

None found at time of writing

Link to other reviews:

None Found

Price point:

MSRP = $159.00

Retail = $135.99 at OpticsPlanet

I need it now! Availability:

GunTec USA or OpticsPLanet

Our Rating:


  • Drop in installation

  • External extractor

  • Nitride coated

  • Works with Colt and Glock style magazines

  • Works with standard AR15 hammers/triggers

  • Made in USA


  • Slight raised lip by gas key

Score: 8.00 Great


Favorite Link:   Brothers & Arms

Guntec 15" Compression Handguard

 Guntec Usa sent me their new compression M-Lok handguard for review. They were also kind enough to send an extra one that we gave away on the podcast. This particular handguard is a 15” free float and anodized black. Guntec has been making AR accessories in the US for decades.

 I noticed a few new things about this compression handguard. Guntec put some QD mounts at the rear of the handguard. In my opinion, this is a great asset. It also came with 1 QD swivel. This handguard also has M-Lok slots all the way down both sides as well as the bottom. That was one of my complaints with their Air-Lite that I reviewed some time ago. This one also has a full length top picatinny rail. As well as diamond cuts throughout to reduce weight. The black anodizing is also a little dull looking, more of a matte finish as compared to a gloss one. It doesn’t scratch off or anything, so there is no need to worry about it.

You can see the slight misalignment of the rail to the receiver

 Installation on the compression handguard is super easy. All you really need to do is install the barrel nut and tighten to manufacturers specifications (standard AR15 barrel nut torque). There is no need to index the barrel nut. Slide the tube on. Line up the top rail with the receiver rail. Then tighten down the 4 clamp screws. I put some medium threadlocker on these 4 screws, but it probably isn’t needed. That is really all there was to it. One slight problem with this particular handguard, is that the rail on the handguard sits a little bit lower than the receiver’s rail. Not enough that flip up iron sights won’t zero, but enough to notice.

 At first I was a little hesitant about the compression style of handguard. But after crashing it up against some 2x4 barricades, I’m not worried about it twisting or not lining up. The clamping force around the barrel nut seems more than enough to hold everything lined up. I really liked the feel of the handguard. It is small enough for me to get my hand around. This makes it very easy to drive the muzzle from target to target. It is just under 2” from the top of the rail to the bottom of the handguard and 1.5” outside diameter everywhere else. The inside diameter measures 1.34”, so don’t expect to put a suppressor under it. And you will definitely need a low profile gas block. The whole combination of screws, barrel nut, and handguard came in weighing 10 ounces on my scale. So pretty lightweight.

 As mentioned earlier, I like how this handguard feels. It does however get warm after 3 or 4 mag dumps. That’s pretty normal given the diameter and how close it is to the gas block. As with a lot of long handguards, there is some flex out at the end by the barrel. Not as much as I have seen on others, but a little. This leads into the location of the QD mount. Because they are located by the barrel nut, any force put on them doesn’t appear to flex the handguard any. Guntec also sent some rubber M-lok plugs with the handguard. These plugs just kind of push into any unused slots and give a rubbery grip to the handguard.

 If you’re interested in some quality, value priced AR parts, go check out Guntec USA. This particular handguard is pretty decent. It feels good in the hand, looks decent, and won’t break the bank. Plus, if it’s not your style, they probably have something that is.

Firearms Insider Reviews - 8 Key Points

Claim to Fame:

15" Compression handguard for modern sporting rifles

Target Market:

Users wanting to upgrade to a 15" handguard

FNBs (Features & Benefits of this product):

  • T6 Aluminum Body
  • Proprietary Lightweight Aluminum Barrel Nut Included
  • Total Weight Including Barrel Nut Is 10 oz.
  • Triangle / Diamond Cuts Throughout Handguard to Reduce Weight
  • Rail System Slides Over Barrel Nut , And Is clamped on with 4 clamp screws
  • Monolithic Top Rail
  • 15" Length
  • Internal Diameter: 1.34"
  • Outside Diameter: 1.50"
  • Made in USA

What other aesthetic options or finishes are available?

10" and 12"

What others are saying?:

Nothing found

Link to other reviews:

Rusty Reviews on Facebook

Price point:

MSRP = $150 approximately (Not on website at writing)

I need it now! Availability:

Guntec USA

Our Rating:


  • Lightweight

  • M-Lok

  • QD points

  • QD swivel included

  • Easy Installation

  • Made in USA

  • Rubber M-Lok covers included

  • Small Diameter


  • Rail doesn't line up with receiver

  • Dull anodizing

  • Lack of instructions

Score: 6.5 Okay



Favorite Link:   AR15 Podcast