Shop › CMMG AR15 CRUSH WASHER 1/2" CMMG AR15 CRUSH WASHER 1/2" $3.45 CMMG Crush Washer, 1/2", Fits AR-15, Black 55DA5B8 Quantity: Add To Cart Added! CMMG Crush Washer, 1/2", Fits AR-15, Black 55DA5B8