The Spike’s Tactical 9mm Enhanced Bolt Carrier Group (brand part no. ST9BG01) is a 9mm blowback bolt carrier group built for pistol-caliber AR builds, and it works in both Glock-pattern and Colt-pattern lowers. The carrier body is 8620 steel with a black nitride finish, and it carries the ST Spider logo in laser engraving. A Glock mag cut on the bolt lets it run Glock-style magazines in a Glock-pattern lower. It suits a 9mm carbine or pistol build where you want a purpose-made bolt rather than a converted rifle part. Spike’s keeps the package simple and the weight at 15 ounces.

Key Specifications

• The bolt carrier group is made for 9mm, so it belongs in a pistol-caliber AR build rather than a 5.56 rifle.
• The action is a blowback design, the straightforward operating system used by 9mm AR carbines.
• The bolt has a Glock mag cut, which lets it work with Glock-style magazines.
• The body is 8620 steel, a case-hardening grade chosen for durability under repeated cycling.
• The finish is black nitride, a surface treatment that resists wear and corrosion.
• It is laser engraved with the ST Spider logo on the carrier.
• Weight is 15 ounces, which sets the cycling mass of the 9mm build.

Frequently Asked Questions

Does it fit both Glock and Colt pattern lowers? Yes. Spike’s states it is for use with both Glock and Colt pattern lowers.

Is this a blowback or a gas-operated bolt carrier group? It is a blowback design built for 9mm, so it does not use a gas key.

What is it made of and how is it finished? The body is 8620 steel with a black nitride finish.

Buy the Spike’s Tactical 9mm Enhanced Bolt Carrier Group

Pair it with the right Spike’s Tactical parts and the AR bolt carrier groups you already trust, then order from our Lubbock, Texas gun shop for fast, insured shipping.