The rugged r3 flash mitigation system is over 30% lighter and 26% shorter than competing 5.56 designs.The r3s patent pending design features world class flash reduction zero ring and a smooth snag-free toothless dual taper locking system.The r3 flash mitigation system is compatible with rugged supressors' radiant762 surge 7.62 razor 7.62 and micro30.Finish: BlackType: Flash HiderModel: R3Thread Pattern: 1/2"-28 tpi