NFM character using guns mounted to their body

[Keyboardstalker]

I'm sorry if this is a stupid question, but I haven't found anything in the basic set that would give me what I'm looking for.

I'm planning on running a game in a universe where most of the characters would be quadrupeds with the No Fine Manipulators disadvantage, but are still able to use guns with a special harness that allows them to actuate the trigger by biting down. Should I handle this by treating it as a vehicle weapon with a fixed or hardpoint mount, and use the Gunner skill? Or would it be better to just have them use the guns skill as normal for the sake of simplicity? Am I missing something or am i just over complicating this?