Shop › SCO ASR MUZZLE BRAKE 5/8"X24 .458CAL SCO ASR MUZZLE BRAKE 5/8"X24 .458CAL $79.90 sold out SilencerCo Hybrid ASR Muzzle Brake, MB Mount, 5/8X24, .46 Diameter AC1733 Sold Out Added! SilencerCo Hybrid ASR Muzzle Brake, MB Mount, 5/8X24, .46 Diameter AC1733