Shop › SCO ASR MB SINGLE PORT 5/8"X24 .30 SCO ASR MB SINGLE PORT 5/8"X24 .30 $79.90 SilencerCo Single Port ASR Muzzle Brake, 5/8x24, Fits ASR Mounts, .30cal/7.62MM AC2627 Quantity: Add To Cart Added! SilencerCo Single Port ASR Muzzle Brake, 5/8x24, Fits ASR Mounts, .30cal/7.62MM AC2627