Airtech Studios BEU Battery Extension Unit G&G ARP9/ARP556.

Features

• Relieve a cramped environment for your MOSFET and cables to sit to prevent it from over bending and damage.
• Utilize larger battery capacity - perfect if you're running the G&G drum mag as a support role.
• Eliminates the unsteady butt-stock by locking down the two metal rails!
• Maximum battery size approx 152mm long x 19.5mm wide x 11.75mm
• Once installed, the ARP9/556 remains just as compact as before - perfect for CQB use!
• Compatible also with the G&G CM16 Raider L 2.0 E
• Button not included