The parts are intended to be machined on Lathes and Mills. However, it would be interesting if someone could do a study on printed parts and their ability to contain pressure (exercise extreme caution with this!!! I would start at 10psi and work from there). I will be posting more designs later for a couple of paintball guns using this design. There are two springs, not pictured in this part. One that spans the gap from the red part to the green, and one one the oposite side, from the blue part to the aluminum colored one.