This kit includes an Obsidian Arms enhanced firing pin, retainer pin and cam pin for the best performance and reliability in an AR-15 bolt carrier.

Features:

• Made from 4340 alloy steel for strength.
• Heat treated for durability.
• Hard Chromed for additional durability, corrosion resistance, and minimal surface friction.
• Made in USA

Included:

• Enhanced Firing Pin, Hard Chromed
• Enhanced Cam Pin, Hard Chromed
• Retainer Pin, Nickel Plated