Proof Research 100523 AR-Style Barrel 300 Blackout 12.50" Pistol Length Gas System 1:8" Twist 5 Grooves, 5/8-24 tpi, Carbon Fiber Wrapped Feeders a versatile and durable tool

a versatile and durable tool designed to tackle various chopping and cutting tasks

Specifically designed to fit X-Bolt rifles in long action

the Magpul ESK allows quick firing hand activation and deactivation of the safety and provides for ambidextrous use

Powerful LED and COB LED chips deliver illumination in several modes

Proof Research 100523 AR-Style Barrel 300 Blackout 12.50" Pistol Length Gas System 1:8" Twist 5 Grooves, 5/8-24 tpi, Carbon Fiber Wrapped Feeders a versatile and durable toolUp to 64% lighter than traditional steel barrels of similar contour. Improved heat dissipation for cooler and longer lasting barrels. Wrapped with high strength, aerospace grade carbon fiber impregnated with a proprietary matrix resin.