This is a Sig Sauer Compensator known as the Tread chambered in 223 Remington, model KIT-TRD-COMP.
3-chambered compensator manufactured specifically for the M400 TREAD to reduce recoil and muzzle rise with a 1/2 x 28 thread pitch.
Features:
For the M400
1/2X28 thread pitch
Black finish
