Premium Grade AR-15 Barrel 16" HBAR W/ 1:8 Twist, 300 Blackout, Pistol Length, Parkerized. Pistol gas system, with .093 gas port, .750 gas block diameter, and threaded for comp. Barrel extension installed with M4 feed ramps. 100% American made. Barrels are manufactured from two types of steel. from Classic Arms (Product ACC-B300PHB1618-P-B70)

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