Aftermarket grip for ATI MB3R shotgun forend fits picatiiny rail. Tactical shotgun foregrip simply installs on any picatinny rail on your tactical shotgun forend and your done. Shotgun vertical foregrip has palm swell and high tech texture with slip-resistant finish for great handling and hand support. Smart end cap conceals storage for most needed accessories and parts. Grip is made from molded unbreakable impact resistant advanced polymer. Overall Width is 2 1/4", Vertical Height is 4 1/2". Fits on any MIL-STD-1913 picatinny rail on tactical shotguns and AR-15 rifle picatinny rail handguard. Picatinny rail sold separately.