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 and up to twenty hours

and up to twenty hours of continuous battery life- safeguarded from inadvertent drain by a ten-minute time out feature

The 7371 comes with the 571BL paddle

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

This model has a black finish and a KeyMod configuration that directly attaches using a patent pending

The catalyst mixes easily into each 1/2 pound target

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 and up to twenty hoursUp 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.