KNS Precision ArmaLite AR-10 .308 Push-Button Pivot Pin Black. The steel has a black oxide finish. The button also has a drilled cross hole which allows for the installation of a seal wire to prevent tampering with the guns internals. This pin is fitted with an end cap to simplify pin removal and installation. It also prevents any debris from entering the internal parts of the pin. Compatible with ArmaLite AR-10 Rifles. Specifications for KNS Precision ArmaLite AR-10 .308 Push-Button Pivot Pin: Manufacturer: KNS Precision Finish: Black Oxide Color: Black Caliber: .308 Winchester Projectile Caliber: .308 Caliber Country of Origin: USA Package Contents: KNS Precision ArmaLite AR-10 .308 Push-Button Pivot Pin KNS Precision AL-308-PBP: ArmaLite AR-10 .308 Push-Button Pivot Pin Black