Kgm Suppressors SR25 Taper Muzzle Brake Black Nitride Steel 3/4"x24 Threads A-TMB-S-3M. Heat-treated Chromoly Steel with OXyN gas nitride finish. Bored to accept up to .338 projectiles. Specifications for KGM Suppressors A-TMB-S-3M SR25 Taper Muzzle...