The Bushmaster ACR Enhanced (Adaptive Combat Rifle) in Flat Dark Earth is designed to be the ultimate semi-auto rifle when it comes to modularity, reliability, and ease of use. In just minutes, the Bushmaster ACR .223 Remington/5.56 NATO semi-auto rifle can be adapted to different calibers just by swapping the barrel, bolt head, and magazine without the use need of any tools. With a small amount of parts swapping the ACR can be transformed into multiple mission capabilities. The 2-position gas piston operating system allows for cooler operation of the rifle, as well as reliability in adverse conditions. A cold hammer forged barrel ensures dependable accuracy with every shot. A unique protective coating on the rifles internals increases longevity and protects against the harsh elements.