1/2"x28 Muzzle Brake for AR-15, Stainless Steel
Dimensions: 2.9 x 0.8 x 0.9 inches (L x W x H)
Bore diameter 0.27"
Includes jam nut and crush washer in stainless steel.
Fits any AR-15 barrel with standard thread pitch of 1/2"x28 (.223/5.56)