The TOMD (Thread Over Muzzle Device) Compact Radial Brake reduces felt recoil without the need for being timed to the firearm it s attached to. This radial brake is easy to install and can quickly pair with the Thread Over Mount to attach your suppressor. This smaller form Radial Brake is lightweight, and offers superb recoil reduction in a tighter, compact package. Compatible with the (TOM) Thread Over Mounts, a quick attach/detach system for your suppressors that pairs with the TOMD Compact Radial Brake. This system combines the utility of the ASR Mounts with the ease of use of the Direct Thread Mounts. Threat Pitch: 5/8 x 24 Bore Size: 30