Dual, curved restrictor plates with a tremendous amount of surface area stop exiting barrel gases and pull the barrel forward to counteract recoil and muzzle flip. The front sight or scope stays right on target for a faster second shot, plus less felt recoil and shooter fatigue. Models available for rifles chambered in .223/5.56mm and .308/7.62mm. 5/8-24 TPI is the industry standard for AR-10-type rifles and also appropriate for custom applications. The .750 outside diameter is designed for standard military contour barrels, but can be tapered down for smaller contours. The 1.000 outside diameter will accommodate the heavy bull barrels common among long-range varmint r Mfg: J P Enterprises