new coax+homemade bullets

[urgle the danish cow]

this is a regular coax piston valve. it is .25 caliber and piloted by a 1/2 ball valve and filled via an ex-propane tank filled with air. my pump is in use so i can only use up to 120 psi
the airchamber is 3/4 inch copper and is sealed with epoxy.
the barrel is 3ft long and .25 caliber. the entire thing is threaded. it should have cost alot but it only cost $7 bc i bought it in the lamp section (not plumbing 8)
the piston is hot glue with 1 layer of masking tape around it for a smoother ride. the sealing face is rubber that is about 3 or 4mm thick and presses up against the end of the barrel which is lined in teflon to improve the air seal.
the bumper is a thick o-ring which lies in the 3/4 to 1/2 adapter

also i took my first try at casting my own bullets. the idea is not mine, i think i got it off one of the how-tos here so please speak up if i am using your idea bc it works well for me.
the block is two wood pieces with three .25 holes drilled roughly 15mm deep. i put flux on the inside and then use a blowtorch to melt solder into the holes. then i take off the clamps and retrieve my bullets.

the bullets work fairly well and with this gun at 100psi i blasted a hole through an empty spray-paint can. with airsoft bbs i can shoot very powerfully and about 100ft

i am satistfied with this gun and please comment


BTW I ADDED SOME PICS OF MY NEXT PROJECT IN THE MAKING JUST TO MAKE YOU WONDER

[lemming124]

you should be satisfied it looks great! how is the barrel centred?

[Gaderelguitarist]

Why are you showing that very average coax alongside your next project which is quite obviously a machined piece of envy?

This inconsistency is bothering me. All neat stuff though.

[urgle the danish cow]

you should be satisfied it looks great! how is the barrel centred?

the barrel has a spacer on the inside made of duct tape rolled up and then 1/4 inch holes drilled through through the tape for air flow

[jackssmirkingrevenge]

If you could get that lovely breech machined, why are you casting your slugs in a block of wood? Even a section of barrel material seems like a better idea.