A high-quality precision machined black crush washer for AR-style rifles which is a perfect replacement or upgrade for existing parts to ensure correct alignment of flash suppressors moderators or muzzle brakes.These crush washers have been re-engineered for a better-looking assembly and improved fit and will look great on any firearm.The major diameter of these washers is 11/16 or .688. The standard diameter of a barrel is .7 at the muzzle. These will fit on any 1/2 thread no matter the TPI. They ensure the proper torque because they crush at the correct specifications then they act like a lock washer to keep end-of-barrel accessories such as muzzle brakes from loosening.
- 1/2 Inch 5/8 Inch
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