I know it's been a while since I last posted one of my mods, but school and fencing have been quite demanding. So, now that I finally have some free time, I thought I would post something. This idea came to me when I was thinking about the Longshot. I didn't like all that empty space there was inbetween the plunger and the barrel, so I came up with a fix for that. Now, I know that it is eay to make a breech with no wasted air, but you would have to pull the barrel forwards and then backwards, whereas this is a backwards and then forwards breech, like the LS has.
You might be saying: "Bullpup? that thing is huge!" And, it is, but when I say bullpup I am refering to the fact that it can be mounted on top of guns and has absolutley no wasted air flow, and has the backwards-forwards shotgun motion.
Breech closed.

Breech open.

So, If you are now curious about the workings I will tell.
See that hole right there?

Closer.

Well, that is where the barrel starts, and this is going to get hard to explain, so here is an MS piant diagram for you.

If anyone has questions because of my crappy diagram and descriptions, just ask.
The tough coughs as he ploughs the dough.
-Dr. Suess