The Atlas Tactical action is a Remington semi-clone action, featuring a side bolt release and trigger hanger. There is little modification necessary to use a Remington 700/40x stock or chassis. Kelbly made the most rugged action possible for practical, tactical, or hunting. They use a Black Nitride finish from H&M Metal Processing. This allows you to use this action "dry" or without lubrication for extreme environments. As always it is best to use lubrication in normal day to day shooting. In addition to the Black Nitride process we use a fluted bolt, to help move dirt into the flutes allowing better function of the action. They cut the magazine well to use the A Mfg: Kelblys Inc