The Fail Zero Semi-Auto Bolt Carrier Group (brand part number FZ-AR15-01-NH-BLACK) is a complete, mil-spec-pattern carrier built specifically for semi-auto AR-15 uppers chambered in 5.56mm/.223. Fail Zero machines the carrier from steel and treats every wear surface with its EXO nickel boron coating under a black topcoat, cutting friction so the action cycles smoother and cleans up faster than a standard phosphate-finished carrier. The group ships complete and ready to drop in, with a 5.56/.223-compatible bolt and extractor, cam pin, and firing pin already installed. It’s a direct upgrade for shooters who want a more reliable, lower-maintenance carrier group without the full-auto carrier weight and geometry.

Key Specifications

• Machined for semi-auto AR-15 uppers.
• Built for 5.56mm/.223-compatible bolts and extractors.
• Treated with Fail Zero’s EXO nickel boron coating for reduced friction and easier cleaning.
• Finished with a black topcoat exterior.
• Machined from steel for durability.
• Includes the cam pin as part of the assembly.
• Includes the firing pin as part of the assembly.

Frequently Asked Questions

What finish is on this carrier group? Fail Zero’s EXO nickel boron coating under a black topcoat, which reduces friction and makes cleaning easier than a standard phosphate finish.

Does it come complete? Yes, it ships with the bolt, extractor, cam pin, and firing pin already installed.

Is this the full-auto or semi-auto carrier? This is the semi-auto profile carrier, built specifically for semi-auto AR-15 uppers.

Buy the Fail Zero Semi-Auto Bolt Carrier Group

Upgrade to a smoother-cycling, easier-to-clean carrier group built to mil-spec tolerances. Order it from our Fail Zero lineup, part of our AR bolt carrier groups selection, at our Lubbock, Texas gun shop for fast, direct shipping.