This is a TROY Muzzle Brake known as the Claymore chambered in 556NATO, model SBRA-CLM-05BT-00.
The Troy Claymore Muzzle Brake(TM) directs muzzle blast and sound forward" away from the shooter" while retaining effective muzzle brake properties. This rugged muzzle brake features a very low dust signature without a swirling effect and is tough enough to serve as an improvised breaching device if the situation calls for it.
Features:
1/2X28 thread pitch
Heat treated ordnance steel construction
