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 .308/7.62mm. 5/8-24 TPI is the industry standard for AR-10-type rifles and also appropriate for custom applications. The 0.750" outside diameter will accommodate the heavy bull barrels common among long-range varmint rifles including, but not limited to, the M15 and AR10-type rifles. The JPRE-324MG has a final exit hole of .350 and can be enlar Mfg: J P Enterprises