High quality triggers. State of the art CNC machined housing made from T6 6061 billet aluminum. All internal levers are investment cast from a-2 tool steel CNC machined and heat treated. Levers are electroless nickel plated for smooth operations. Do-it-yourself installation. Shipped with all parts and instructions. Remington 700 - Replaces All Models Including X-Mark Pro Remington Models 700 721 and 40X. 100 percent drop-in. Adjustable from 1.5 to 3.5 pounds. Includes safety and bolt release.