FailZero M16 Bolt Carrier Group – AR-15/M16 Compatible

The FailZero M16 Bolt Carrier Group is a complete, drop-in replacement BCG for AR-15 and M16 platform rifles. This full-auto profile carrier features FailZero's proprietary EXO nickel boron coating, which provides permanent dry lubrication at the molecular level. The coating reduces friction, resists fouling buildup, and simplifies cleaning—no additional lubrication required under most conditions. Upgrading to a coated BCG like this one extends time between cleanings and improves reliability in adverse environments.

Constructed from mil-spec 8620 steel (carrier) and 9310 steel (bolt), this BCG is MPI and HPT tested. The EXO coating is applied to all contact surfaces and penetrates the metal structure rather than sitting on top like traditional coatings, which means it won't flake or peel over time. Installation is drop-in for any mil-spec AR-15 or M16 upper receiver—no fitting or gunsmithing required. The M16 full-auto profile provides additional mass for reliable cycling with a wide range of ammunition weights and gas system lengths.

• Part Type: Complete bolt carrier group
• Compatible Firearms: AR-15, M16, and mil-spec AR platform rifles
• Material: 8620 steel carrier, 9310 steel bolt
• Finish: EXO nickel boron coating (all contact surfaces)
• Profile: M16 full-auto
• Testing: MPI and HPT tested
• Installation: Drop-in
• Includes: Carrier, bolt assembly, cam pin, firing pin, firing pin retaining pin