Edit 2: Turns out the deadline was midnight last night, not tonight, so I'm probably out of the running.
Edit: Done with just four hours left.
Holy crap there's like 3000 of these.
My plan is to make a few weapons for the engineer. The first is a ball-peen hammer which could replace either the wrench or the PDQ if it is indeed included in the engineer update. The second will be a nail gun (concept soon). I have some ideas for a shotgun replacement, but it may become a hat depending on time constraints.
Ball-peen Hammer Concept: