PROSUPPLIES Steel Crush Washers 6 PCS For 1/2"x28 Thread + 6 PCS For 5/8"x24 Thread Muzzle Device Alignment 12PCS COMBO Go to amazon.com Related posts Thing need consider when find muzzle brake 5/8x24? FeatureCNC Machined, works perfectly with your expensive muzzle device.223/5.56 FOR 1/2"-28 TPI Thread.308/7.62 FOR 8/5"-24 TPI ThreadPACK OF 12 PCS DescriptionCNC Machined, works perfectly with your expensive muzzle device