Shop › SCO THRD OVR MZZL BRK 5/8X24 .30 CAL SCO THRD OVR MZZL BRK 5/8X24 .30 CAL $79.90 SilencerCo Compact Radial Brake, 30 Caliber, Fits 5/8X24, Compatible with SilencerCo Thread Over Mounts AC5233 Quantity: Add To Cart Added! SilencerCo Compact Radial Brake, 30 Caliber, Fits 5/8X24, Compatible with SilencerCo Thread Over Mounts AC5233