Aim Sports Crush Washer 223 Rem 5.56x45mm NATO AR15 Steel 12 Pack is your go-to solution for precise muzzle device attachment. Designed to fit most barrel profiles these durable steel crush washers ensure proper indexing of flash hiders or muzzle brakes. A compact 12-pack provides reliability and convenience for all your AR-15 customization needs. Perfect for 223 Rem and 5.56x45mm calibers. Rugged black finish and dependable design make it an essential accessory for your firearm setup. Secure and hassle-free alignment every time.