TacFire MAR120 5.56x45mm NATO Hard Chrome Firing Pin for AR-15/M16

The TacFire MAR120 Firing Pin is a direct replacement 5.56x45mm NATO firing pin built from 4140 steel with a hard chrome finish. Designed as a drop-in fit for standard AR-15 and M16 platforms, it is ideal for finishing a custom build or replacing a worn or damaged factory component.

Machined from 4140 carbon steel for strength and durability, the MAR120 features a hard chrome finish that resists corrosion and wear. Whether you are completing a new AR build, repairing an existing rifle, or simply keeping spare parts on hand, this TacFire firing pin is a reliable replacement for the standard AR-15/M16 bolt assembly.

The MAR120 is sold individually as a single firing pin ready to install.