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AR-15 Barrel: 10.5″ M4 Barrel with 1:7 Twist, Chambered in 5.56/.223, Parkerized Finish, 4150 material, gas hole is .086, Carbine Gas System, 1/2 x28 threaded barrel. Gas System Carbine
Gas Block System .750
Ensuring to meet high expectations I have personally seen the accuracy of these barrels first hand when test firing. This barrel is threaded 1/2x28 using a Carbine Gas System and a .750 Gas Block. Look for our Gas Blocks and Gas Tubes under AR15 Upper Parts and make sure not to miss out on this quality barrel at a great price today!!
Check out this product on my website! http://www.battlecreekarmory.com/product-p/amb56n10m4c7.htm