Semi homemade CPS with pieces from a XSHOT blaster

[SSCBen]

Now I'd recommend 3 inch PVC drain pipe. The 4 inch pipe I have in the parts list was too large, causing the bladder to flop around inside the case, and making the blaster larger and heavier than necessary.

[Drenchenator]

Ben raises a good point, though I should point out that whenever I used 4-inch drain pipe, I attached a 4-inch circular piece of plastic to end bolt to act as a guide for the bladder is it expands. That eliminates the problem Ben talks about, in my experience. It appears that I never took any photos of this for my own guns but I did built this.

[Zman]

What the best way to cut LRT

[SSCBen]

As I wrote on the LRT guide on SSC, scissors work:

Cutting LRT can be done with scissors. Cut using the part of the scissor blade closest to the joint for maximum leverage. Cutting rubber is odd--it bounces back and the thickness makes it hard to cut. The part of the blade closest to the joint has the most leverage so it is the ideal place to cut.

You could also try something intended for stronger materials like shears.