guys do you kneed help building pnumatic spudguns

[quinn whitsitt]

i want to help and i will do my best to help you all

[tatertime]

what size fire extuinguisher and what type would be decent for a cannon? or at least i feel like a fire extuinguisher would work well. also what valve to use?

im fairly new to this, im in the uk if that helps,
this is my barrel,

https://www.plasticpipeshop.co.uk/2-Whi ... E1MjAwMDg2

although i will cut it down to a more practical length.

i realise now that im replying to a basically two year old post but any help is appreciated