Battery case with picatinny rail

Hi everybody
I needed a powerful battery for my airsoft replica but the original battery housing is too small so I needed an An-Peq type case but for Ni-Mh 9.6v 8 cell batteries.

This case holds a battery by keeping it slightly forceful by its shape of clamp, the battery is retained at the back by 4 studs and the cover comes to close the assembly, a window allows the passage of the cables.

In the CAD I voluntarily made no hole for the screws in the rail as it fragilized it once manufactur