What I've done is epoxied a 5mm tube into the 1/2" copper tube. This power is alright. It goes thru a sheet of plywood. the barrel is made of brass and I think it's a little bent. I can pump to 300psi then release with bungee cord. Hopeing to put a scope on it and maybe hit some tin cans!

Hi I'm new to this forum. I've made an moderatedly good airgun already which consists of 1"copper pipe with end stop for the tank filled with a bike valve. Then that feeds into a lever ball valve The barrel is 1/2" copper pipe. All of these joined with compression fittings and epoxy I want to add a ...