Umarex XBG Carbine Conversion Kit: * Takes an Umarex XBG pistol and transforms it into a carbine rifle * Foldable stock has integrated Picatinny rails * Foldable and removable front grip * Fixed front sight * Can convert an HK USP, S&W MP40 BB, Walther P99 Airsoft and the Combo Zone Enforcer * Model# 2259170