5/8"x24 Muzzle Brake for .308, Steel, Black.
Dimensions: 0.98 x 2.84 x 2.84 inches
3 pieces - the brake with outer threading, plus two outer covers. Attach brake to muzzle threads then screw on one of the outer covers:
Photos 4-5 shows plain tube cover
Photos 6-10 shows decorative cover
3 piece muzzle brake