The Tactical stock sports an 80/20 blend of polypropylene and fiberglass wrapped around a full length aluminum bedding block, an adjustable spacer system allowing for 1" 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.Notes:LOP: Adjustble from 12-1/2" to 13-1/2"Will take a barrel diameter of up to 11/4"