Fire arms and cheat!

[antee]

Hello! I've played with my mates and we faced this situation:

One player has the fire arms and Sledgehammer of smackdown (req 2 hands) on the cheat... so he should get +5 from sledgehammer and +6 from arms... or just +5, because sledge requires 2 hands and he has no free hands to power up fire arms?

The main argument for only +5:
cheat doesnt change item, it's only allows to use it against rules... so sledge occupies both hands and u cant get bonuses from arms...

And question 2: if i play fire arms with cheat, would i get +6?