Overview

My intention was to make a new CPVC breech with minimal deadspace and that I wouldn't have to worry about harming my fingers with. I had to move the handle forward two inches to accommodate the 3+1/2" to be able tocock it.
The breech assembly out of the shell:

^visible are the bolts I added to reinforce the epoxy
Here's a drawing too:

It's pretty straightforward, the purple thing is the breech cover, the little blue thing is a dart stop, black is CPVC, some measurements are shown.
Construction:(sorry, no pictures, this is post construction after all)
Took it apart,removed the stock breech and a lot of the internals
I made the breech using 14" of CPVC, I cut a loading slot 1+1/2" long, 2" from one end. The dart stop is roughly 1/2" from the end of the CPVC, I epoxied it directly into the orange/black pushing back part, NOT to the tube coming from it (the CPVC is in contact with the plunger head). Then I slipped the plunger tube over the cpvc (not forgetting that oring) and 2" of AT2K pump tube. 7" from the back of the breech I epoxied on half of a CPVC teeto attach the handle to. Then I cut up the shell to allow it to fit and to lock forwards
Operation:
Rest:

Primed (back):

Primed (forward):

Loaded:

Breech closed:

I have some plans for improving it... Integration much?

[/evil laugh]
Questions/whatnot?