Changing a model for 1 weapon to a model for another.

Well lets say I have a model for the crowbar(In this example it’s a dildo) and I want to change it into a model for the…knife for example how would I go about doing that?
Simple question,I assume the answer is horribly complex.

EDIT:
Anyone able to move this to the “Modelling” section,I’m blind and didn’t see it :stuck_out_tongue:

Small bump,not entirely certain what the rules are on bumps as I’m not too active here but I apologise if they are not allowed.

why do you have a crowbar dildo

Why don’t you have a crowbar dildo?

That was just an example,but I want a knife dildo instead.