The Wilson Combat Bolt Carrier Assembly is a complete AR-15 bolt carrier group machined for 5.56x45mm NATO from Wilson Combat (brand part no. TRBCA), built to the full-auto bolt carrier profile and finished in black Parkerizing over steel. The added mass of the full-auto profile helps smooth out cycling even in a semi-auto rifle, while the steel construction and Parkerized finish stand up to sustained use and resist corrosion. It drops into a compatible AR-15 upper as a complete unit, giving shooters a durable, factory-quality replacement or upgrade for a worn or aging carrier group.

Key Specifications

• Bolt face and dimensions machined for 5.56x45mm NATO, matching standard AR-15 bolt specs.
• Built to the full-auto bolt carrier profile, which adds mass versus a semi-auto-only carrier for smoother cycling.
• Constructed from steel for durability under sustained use.
• Finished with black Parkerizing for corrosion resistance and reduced glare.
• Sold as a complete bolt carrier assembly, ready to drop into a compatible AR-15 upper.

Frequently Asked Questions

Is this a full-auto or semi-auto profile carrier? It’s built to the full-auto bolt carrier profile, which adds mass for smoother cycling in a semi-auto rifle as well.

What finish does it use? Black Parkerizing over steel for corrosion resistance.

What caliber is it machined for? 5.56x45mm NATO.

Buy the Wilson Combat Bolt Carrier Assembly

Upgrade the heart of your AR-15 with the Wilson Combat Bolt Carrier Assembly, built to full-auto specs for smooth, reliable cycling. It ships fast from our Lubbock, Texas gun shop, and our AR bolt carrier groups selection has more bolt carrier groups for your build.