The Colt AR15A4 Bolt Catch Pin is a small but critical factory component designed specifically for AR-15, AR-15/M4, and M16 platforms. As a genuine Colt part, this pin secures the bolt catch in the receiver so the rifle can reliably lock open on an empty magazine and function as intended. Its simple, robust construction makes it a dependable replacement when servicing or rebuilding your rifle.

This model is ideal for shooters who want to maintain their rifle with original-spec common parts rather than generic hardware. Whether you are refreshing a well-used carbine, completing a parts build, or keeping spares on hand for the bench, this pin helps preserve consistent operation and straightforward maintenance. It reflects Colt’s long-standing focus on practical design and dependable performance for the AR-15 platform.

• Manufacturer: Colt
• Model: AR15A4 Bolt Catch Pin
• Compatibility: AR-15, AR-15/M4, M16
• Part Type: Bolt catch pin, AR-15 common part
• Installation: Designed for easy replacement using basic tools