Airtech Studios VFC Avalon PDW Series Battery Extension Unit (Black)Features Relieve a cramped environment for your MOSFET and cables to sit to prevent it from over bending and damage Utilize larger battery capacity 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 VFC Avalon PDW remains just as compact as before perfect for CQB use Manufacturer: Airtech Studios Color: Black Tired of using smaller batteries for an