My REAL gamertag is kingstripe.
u make weapons float 2 ways... i think, i don't know if this works for weapons, but it works for walls, blocks, etc. First, you stack blocks until you are at the height u want, then u put the weapons on the stack, then u delete the stack and they will float. second way, place the weapons where u want, and while holding it in forge mode, hit save changes then end the game. When you reenter they will be floating.