Cool. Thanks guys. I would love to use HPA. Biggest problem is availability. Bottled CO2 is the simplest option for purchasing hence my desire to use that.

Hey guys.

Fairly new to all this. Either way im building my first air gun.

Im using copper pipework with a fairly basic compressed air trigger valve. At this stage im intending to use bottled CO2 as my fuel. The goal being from a Sodastream bottle or a MIG welder. (portable and easily available ...