Paintball Shotgun 2

 I spent a bunch of time on this. Please don't ask me for plans as there isn't any. I don't even have a pic of the internals. This one is unique and the process was completely undocumented. Yes, the barrel is small. It's 1". I was building a shotgun. Real shotgun don't shoot wads of normal size bullets, so neither does this one. It uses shells loaded with 40mm paintballs. I have to try some 50mm to see how they fit. Roughly 25-30 of these little paintballs fit in one shell. Only 3 or 4 standard size would fit. It also shoots what I call sniper shells. They are 1" x 1 1/4" long or so. They have little balloons in them filled with grenade paint. They hold roughly 4-5 times the amount of paint as a paintball. They also shoot very nicely.
Ok, on to the gun. It has a spring loaded pop-up barrel. There is a hinge at the front, a spring in the middle and a U shaped bar goes over the barrel to work as a stop. There is a sliding grip on the back of the barrel. You load a shell in the rear, push the barrel down and slide the grip back over the PVC reducer to lock it in place. I modified the ball valve to mount in the middle of the stock with the handle acting like a trigger. The trigger only needs to move an inch or so, not anywhere the normal 1/4 turn. The trigger also has a spring which quickly returns the valve to the closed position. The gun also has an internal expansion chamber tapped and fitted with a bottomline. Notice it looks like it is 2 colors of black. Well it is. The main part of the gun is a standard black and the back end is rubberized.

There are three things I still have to do on it. The first is to mount the bottomline adapter. It goes about where it's sitting. I have to put the butt plate back on, and also the cut out area around the trigger and underneath will have a metal plate over them.

The final pic

Shotgun in open position

 
Shotgun in closed position

 
Spring loaded pop-up barrel 

 
Spring loaded trigger assembly

 
Finished with cover plate

 
Pic of the damage. The blue to the left is the grenade shell. Next to it in white is a normal paintball. This was 2 shots. One grenade shell and one shotgun blast. The shotgun shell only had half a dozen 40mm paintballs in it and 3 standard size. You can see the 40mm paintball breaks are fairly small, but visible. 


Shotgun Shell

 
1" Grenade Shell