The Tactical stock has a full length aluminum bedding block for added strength, an adjustable spacer system allowing for .75" of adjustment in length of pull, a rail integrated into the bottom of the forend to mount a bipod and four swivel studs for customized carry options. This stock takes the Savage factory detachable magazine actions with action screws spacing of 4.4" center to center. Notes:Will not fit the detachable magazine rifles with the magazine release button is part of the magazineWill not fit the Savage detachable magazine rifles with the accurate-mag or PTG bottom metal that uses the AI magazineThere will be an 3/16 gap under the safety on all the Savage Varmint, Tactical and Sniper stocks. The action should only touch on the V of the bedding block and back of the recoil lug.