bolt carrier

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


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