Developed to fit handguards equipped with a Weaver or Picatinny rail system. Use of the VERTICAL GRIP will allow a natural "fighting stance" hold on your rifle. By positioning your hands with one on the pistol grip and the other on the VERTICAL GRIP, improvement in both the reaction time needed to get "on target" and muzzle control during rapid fire will be noticed. The VERTICAL GRIP may be positioned, and held firmly, on the rail by simply pressing the lock button and sliding the GRIP to the intended location and then releasing. No tools or gunsmithing required. FOBUS VERTICAL AR/15 M/16 GRIP fO-vG1$49.99 Buy Gun Holsters global distributors focused on Military & Police Supplies. Renowed manufactures include Blackhawk Industries, Galco, Gould&Goodrich, Don Hume, Fobus, Sreamlight, ASP, Helstorm, Hydrastorm, Hogue, Original S.W.A.T. Tactical Footwear, Bianchi, Hatch Gloves, 5.11 Tactical Series, and multiple product lines.