The BCI Specna Arms PDW Extended Battery Cap is a lightweight and essential supplement to any Specna Arms PDW airsoft configuration. It expands battery capacity and is optimally compatible with the standard stock tube. The caps guarantee full extension and almost complete closure of the stock. We suggest purchasing a 2-pack for back-up, as the tubes and caps are very fine thread and may be easy to cross-thread. (TRICK: screw it on backwards a few turns to line it up then forward.)

The shorter is suitable for most Specna PDW's.

The longer cap was specially designed for the Edge 1.0 with the included mosfet and all its wiring, enabling the usage of a 11.1v 1000mah LiPO to fit perfectly.