At just 2.9oz and 1.9? long, the R3 Flash Mitigation System (5.56) is over 30% lighter and 26% shorter than competing 5.56 designs. The R3's 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 all of Rugged Suppressor's rifle and multi-caliber silencer. Rugged Suppressors 1/2x28 R3 Flash Mitigation System FH001