Don’t lose your grip when things get dirty. Troy Industries Combat Grips offer versatility, unmatched durability and outstanding ergonomics in a grip that complements all Picatinny rail systems. Features * Grip converts easily into two sizes * 4 5/8” when completely assembled * 3 1/4” when in short (stubby) mode * Thumb screw and low-profile attachment screw included * Three part modular design * High capacity internal storage container * Finished in Flat Black or Flat Dark Earth * Weighs less than 6 oz. * The perfect accessory for all Picatinny Rail SystemsThumb screw included - fits inside Grip.