SpudFiles

just for a bit of fun i made a tiny coaxial bb gun using a sch 80 nipple and 2 1" threaded encaps for a chamber, the piston is a piece of rubber, epoxied to wood. i drilled a 1/4" hole in the 1/4" compression x 1/8" npt adapter so the brakeline would slide thru it, it works very well, the bumper is a piece of sheet rubber, left over from when i cut out the piston

Is it a cloud bbmg or a single shot gun
holy crap that must pack a punch, isnt a piston "over kill"
is there a pin hole in the piston to equalize

its a single shot gun, i dont think a piston is overkill
no theres no equalizer because the rubber isnt cut perfectly, theres a little notch out of the side that lets air thru

What is a coaxial piston?

coaxial means the barrel extends inside the chamber, i'm not gonna explain pistons to you because you should know that

do you think it can work like a cloud? if you can fill it up.

i could, but that would mean tapping another hole in the bottom, and using a different screw on cap, really its too much work when i already have a good firing cloud