I have a like new Tango Down Battle Grip that came with my Bushmaster. It is black in color and has the all weather proof plug. I'm looking to trade this grip for a Magpul MOE. Here is an insert from Tango's website....
BATTLEGRIP Model BG-16 fits all M4 / M16 / AR-15 series rifles and clones, Armalite AR-10 and Knights Armament Corp SR-25 / MK -11 Mod O. Any rifle configured to take a standard M16 / AR-15 grip will accept BATTLEGRIP. Grip includes foam anti-rattle battery spacers, stainless steel Dry-Lok fastener, installation tool and complete instructions for easy installation. Batteries and spare parts not included.
Internal Battery Storage Compartment
Weather Resistant Cover
Weight: 3.52 oz