Crush Washers are made from special engineered, heat treated steel that has been fine tuned and balanced between high spring rate and ductility to meet the function requirement of "crushed with high spring tension without cracking".
This crush washer is designed for AR-15 flash hider, muzzle brake or compensator installation on barrels with a 1/2x28 thread. This crush washer will fit every standard AR15 on the market chambered in 5.56/.223, as well as all pistol/rifles chambered in .22LR and 9mm.
NOTE: Crush washers are only intended to be used (1) time. Using a crush washer multiple times will decrease the effectiveness of the washer.
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