Bushmaster 5.56 NATO/.223 Remington Crush Washer Black. Designed to provide superior sealing and prevent gas leakage this high-quality washer is the perfect addition to your firearm maintenance kit. Crafted from durable materials the Crush Washer is available in three different sizes to fit your specific needs. Choose from the 450 Bushmaster 308 Winchester or 5.56 NATO / .223 REM sizes and experience top-notch performance and reliability. Specifications for Bushmaster 5.56 NATO/.223 Remington Crush Washer: Manufacturer: Bushmaster Color: Black Features of Bushmaster 5.56 NATO/.223 Remington Crush Washer The Crush Washer is a gun accessory that provides superior sealing and prevents gas leakage Package Contents: Bushmaster 5.56 NATO/.223 Remington Crush Washer Bushmaster F1008563: 5.56 NATO/.223 Remington Crush Washer Black