With professional shooters in mind, the Obsidian Arms Enhanced AR-15 Bolt Carrier Pin Kit is made from high quality 4340 steel that has been heat treated, hard chromed for durability, in addition to its durability, Obsidian Arms Enhanced AR-15 Bolt Carrier Pin Kit treated for corrosion resistant and ensures minimal surface friction. Giving the reliability you need when you need it most. Specifications and Features:
Enhanced Firing Pin
Enhanced Cam Pin
Standard Retainer Pin
Lifetime warranty