Hogue’s AR-15/M16 Cargo Management, Storage Kit System, for AR-15/M16 comes with a battery cradle that can store 3 SureFire 123A, 2 AA batteries or 4 2032 batteries. An extra cover is provided that can be used in place of the battery cradle to allow storage of other items. Fits inside Hogue AR, AK and SIG556 Monogrips. Batteries Not Included.