The Classic Army CA100M M4 Pistol Package in black is a special combo deal. You get the CA M4 airsoft gun pistol AEG, along with an optional short M4 stock. Use with or without the stock. A great CQB package for all players.Package does not include battery or charger. The battery compartment is in the front handle area, but is really tight. A 7.4v LiPo flat panel style, or really thin type, should fit in the front.M4 stock is included with installation parts (easy to install). Not wired to stock area though. Also included is a front RIS grip and extra 300 round hicap magazine (total of 2 included).