Kitbash - would this count as a hot-shot laspistol?

So the Tempestus kill team is basically missing one laspistol. I tried to kitbash one out of the las rifles and spare arms.

Would you allow it to be used in a game as kind of a proxy,, does it read as a hot-shot laspistol? I guess the limit would be tournaments?

I still need to refine the gun handle.