Air Venturi Avenge-X Bullpup Bottle Conversion Kit Compatible with all Air Venturi Avenge-X rifle models For use with Air Venturi Avenge-X rifles with 400cc carbon fiber bottle If you are converting a tube model of the Avenge-X, be sure to pick up the bottle as well. The bottle is not included with this kit. PY-A-12988 Includes stock, trigger linkage assembly, barrel band, scope rail and necessary screws/small parts