PANB+ Nerf Blaster

USE THE LATEST VERSION STEP, NOT THE STL.
This is a remake of / improvement upon the PANB 870 from Nerfhaven: http://nerfhaven.com/forums/topic/24103-panb-870/ with a larger plunger tube and printable mechanisms and body. v3.5 is shown in the top 2 images.

Rendered this on the 4th of July, so that explains the decals in that one render.

Update to v2: Someone asked for screws for easier disassembly. So I went off the deep end on easy disassembly and added 2 carriage bolts and wing nuts (and proper holes for them) as an alternative fastening method for the two shell halves. I also solved the problem of the breech pivot, McMaster parts have been chosen for that. It still needs a little work, but nothing a little electrical tape shimming can't do.

Update to v3: Don't print this at 5% infill with that crappy but really fast infill pattern that usually looks like diamonds, but upon closer inspection, is really just alternating linear layers. I learned the hard way. Also, don't prin