CMMG 55BA492 AR-15 Firing Pin Stainless Steel

The CMMG 55BA492 is a drop-in replacement stainless steel firing pin designed for AR-15 bolts chambered in .223 Rem, 5.56x45mm NATO, and 300 Blackout. Manufactured in the United States from corrosion-resistant stainless steel, this firing pin delivers reliable ignition and long service life for AR-15 rifle, pistol, and custom build applications.

This is a direct OEM replacement for the standard AR-15 firing pin, precision-machined to fit Mil-spec and aftermarket bolts for the listed calibers. The natural silver finish of the stainless steel makes it easy to identify during disassembly and inspection, and the material's hardness and toughness help it stand up to repeated dry-fire and live-fire cycling without deformation or breakage.

Whether you are completing a new build, replacing a worn or damaged pin, or keeping spares on hand for your AR-15 platform, the CMMG 55BA492 firing pin offers the quality and consistency you would expect from one of the industry's most respected AR-15 specialists. It is a simple, cost-effective insurance part that should live in every builder's range bag.