The Aim Sports ACWA1 Crush Washer offers a durable, steel-built solution for proper timing and alignment of muzzle devices on rifles chambered in 223 Remington and 5.56x45mm NATO, packaged in a convenient 12 pack for reliable field and range use. Crafted with a black finish for corrosion resistance and lasting performance, these washers provide a precise, crush-style engagement that helps ensure your flash hiders, compensators, or muzzle devices sit correctly for optimal gas flow, reduced side-blast, and consistent point-of-impact behavior. The ACWA1 is designed to beat the test of hard use in the field, range, or duty environments, delivering consistent seating that supports repeatable accuracy across multiple builds or maintenance intervals. Whether youre assembling a new AR-15 upper, upgrading an existing setup, or stocking up for routine maintenance, these crush washers simplify installation by providing a reliable, uniform interface between your muzzle device and barrel. Take advantage of Aim Sports proven manufacturing standards and the 12-pack convenience to keep your rifle performing predictably, with the confidence that your muzzle device can be re-timed or replaced as needed without compromising fit or finish.