Quick view AXIS MFG Nitride 9MM BCG Glock/Colt The AXIS MFG 9mm Bolt is precision CNC machined from 416 stainless steel, heat treated to a Rockwell hardness of 32-36, and completed with a durable, black melonite finish. Caliber: 9mm Material: Heat treated, 416 stainless steel Finish:... MSRP: Was: Now: $179.99 Add to Cart Compare