thanks crna legija but i think its a lot simpler to make a combustion rifle.

i would prefer a combustion. if you say pressure rated pvc is fine i believe you and think it is going to be fine.
i don't agree on simplicity. combustion is simpler if you ask me.
where would i get an electronic sprinkler valve in croatia ?
nowhere . and if i find it it would be around $100 ...

oh . so speaking about power , pneumatic would be more powerful ?
i would take some marbles with me to test fit them in pipe anyway . thanks for warning anyway. :wink:
i was planing on putting a ball valve at the back and inject butane with that plastic thing people get shots with, ( i do not know ...

hi , i've been lurking the forum for a few days now.
i was planning to make a combustion rifle . but i don't know
how am i going to make a chamber. since the barrel would be much smaller in diameter if im not mistaken the pressure inside chamber is going to be much higher than in those of cannons ...