AR-15 Barrel: 7.5″ M4 Barrel with 1:7 Twist, Chambered in 5.56/.223, Phosphate Finish, 4150 material, gas hole is .086, Pistol Gas System, 1/2 x28 threaded barrel.

Gas System Pistol
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 Pistol 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/amb5567m4p7.htm