Battle Arms Development Enhanced BCG – M4/M16/AR-15

The Battle Arms Development Enhanced Bolt Carrier Group is a precision-manufactured replacement BCG designed for M4, M16, and AR-15 pattern rifles. This BCG addresses common wear points found in mil-spec carriers with improved materials and coatings that extend service life and enhance reliability under sustained fire. Shooters looking to upgrade from a standard phosphate BCG or replace a worn carrier will find measurable improvements in smoothness, carbon buildup reduction, and ease of cleaning.

Machined from 8620 steel with a low-friction coating, the Enhanced BCG runs cooler and cleaner than traditional phosphate-coated carriers. The bolt is made from 9310 steel and properly staked, MPI tested, and shot-peened for durability. This is a drop-in replacement that requires no fitting or gunsmithing—simply disassemble your upper receiver, remove the old BCG, and install. The unit is fully compatible with standard AR-15 fire control groups and gas systems.

• Part Type: Bolt Carrier Group
• Compatible Firearms: M4, M16, AR-15 pattern rifles
• Carrier Material: 8620 steel
• Bolt Material: 9310 steel
• Finish: Low-friction coating
• Installation: Drop-In
• Includes: Bolt carrier, bolt assembly, cam pin, firing pin, firing pin retaining pin