Precision Defense 9mm Bolt Carrier Group for Glock & Colt Compatible Receivers - Nitride

Manufactured by Precision Defense
Manufactured by Precision Defense
9 Reviews

Out of Stock

NOTE: Limit 3 per household. Quantities exceeding 3 will not allow checkout.



The Precision Defense 9mm Bolt Carrier Group is designed specifically for blowback AR-15 pistol caliber carbines. Because of the blowback system, no rotating locking lugs or gas key is necessary like a traditional AR-15 weapon system. What keeps this bolt closed is simply the pressure of the recoil spring and the weight of the bolt is what keeps it closed long enough for the bullet to leave the barrel. The body of this 9mm BCG is machined from 8620 steel with a salt bath Nitride finish for its slick and durable properties. The bolt face itself is magnetic particle inspected and the extractor is machined from S7 tool steel. It also features something that looks like a gas key and it basically is except its sole purpose is to serve as an indexing point for the charging handle. It is however machined from a billet of steel and still has staked screws to ensure it stays in place. The Precision Defense 9mm Bolt is an affordable and reliable option for building a 9mm AR and is compatible with Colt and Glock magazines.

  • 9mm compatible with Colt and Glock magazines
  • Salt Bath Nitride finish
  • 8620 steel carrier
  • Magnetic particle inspected
  • S7 tool steel extractor
  • Billet gas key with staked screws
  • Stainless firing pin
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BrandPrecision Defense
Caliber Gauge9mm Luger
Carrier FinishSalt Bath Nitride
Carrier Material8620 Carpenter Steel
Carrier StylePistol Caliber Blow Back Carrier
High Pressure TestedUntested
Magnetic Particle InspectMagnetic Particle Inspected

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

9 reviews

  • 4 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

No Issues

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Working without issue with ASC colt style mags, put a couple hundred rounds in with it so far and running great!


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Just finished my AR9 build. Used this BCG in combination with a mil-spec upper, 5" FTM barrel, mil-spec lower with colt conversion block and ASC style mags. Also used a JP heavy buffer spring, FTM 9mm heavy buffer and Eotech XPS. This combo cycled flawlessly during its first 200 rounds. Both my buddies were droolin...THIS THING IS AWESOME!

Works great for my build.

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Got this to jump start a PCC build idea ive had an itch for, the build is a spikes tactical upper & lower (trigger assembly as well) for Glock mags,FTM barrel & buffer parts, this BCG had no reviews a few months ago when i bought it, finally completed the build, ran a Glock big stick in it with federal 124gr fmj, ran 2 mag dumps back to back, and no issues with first 200 rounds.

Runs great

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Runs great, no hiccups in my ar9 build
<br>Running a stern defense magwell conversation block
<br>8oz guntec buffer and spring
<br>Zaviar 8.5 upper

Not for FM Products receiver set

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This may be a decent bolt, but it will not cycle in my FM Products receiver set.

Runs EndoMags

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Bolt runs perfectly with Mean Arms EndoMag 9mm PMAG conversion kits.


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Came Quick as always from PA, A little oil 5 rounds then 3 mag dumps, Ate em up and spit em out. 2 more stars

Will not hesitate to buy another.


Runs fantastic. My first 9mm build and I am glad I went this route. Almost all the parts are from Primary Arms.

9mm bolt carrier group

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it works great !