DPMS Panther Arms Bolt Carrier Group 5.56/300BLK Phosphate Steel

The DPMS Panther Arms 5.56/300BLK Bolt Carrier Group is a mil-spec replacement BCG built for the AR-15 platform. Designed to cycle reliably in both 5.56 NATO and 300 AAC Blackout uppers, this single carrier assembly covers two of the most popular AR calibers without compromise, making it a smart choice for any convertible or multi-caliber build.

The bolt is machined from Mil-Spec Carpenter 158 steel and is shot peened, high pressure tested, and Magnetic Particle Inspected (MPI) to verify structural integrity before assembly. The carrier body and gas key are machined from bar stock steel; the gas key is properly staked in place to resist loosening under sustained fire. The full assembly wears a durable black phosphate finish that delivers reliable corrosion resistance and low-friction cycling, and the unit is rated for full-auto use.

Drop-in compatible with any mil-spec AR-15 upper receiver, this BCG comes in at roughly 11.5 oz and is equally at home as a replacement for a worn factory unit, an upgrade for a budget build, or a dedicated spare for a 5.56/300 BLK rifle. It is brand-new, current-production component ready for installation.