This is a CMMG , model 57DA53A.
Use this with a short barrel on your PS90 SBR build to attach your favorite muzzle device. Adapts the standard M12 x 1.0 LH threads of the PS90 to 1/2"-28 which is compatible with most 5.56/.223 muzzle devices.
Features:
Perfect part for PS90 SBR
