Toolcraft Phosphate 5.56 BCG

Toolcraft has established itself as the industry's go-to OEM manufacturer, producing bolt carrier groups for many premium brands at a fraction of the retail cost. The Toolcraft Phosphate BCG delivers mil-spec quality with rigorous testing protocols that match or exceed military contract standards. Manufactured from Carpenter 158 steel bolts and 8620 tool steel carriers, these BCGs undergo both magnetic particle inspection (MPI) and high pressure testing (HPT) to ensure structural integrity under high-stress conditions.

The black manganese phosphate finish provides reliable corrosion protection with a chrome-lined carrier interior and gas key. Each unit is precision manufactured on state-of-the-art CNC machinery in North Carolina, with gas keys installed using mil-spec procedures and secured with grade 8 fasteners that are properly staked. This is the same manufacturing process used for BCGs that retail for $200 or more under premium brand names.

For builders seeking maximum value without compromising reliability, the Toolcraft Phosphate BCG represents the sweet spot of the market. It's backed by a lifetime warranty and has earned a reputation as the "best value" option in the $80-$100 price range, delivering OEM quality at half the price of branded alternatives.