SpudFiles

Yeah 3/4 copper with 6mm barrel coax, with a high pressure pump mounted below.

elitesniper wrote:let the piston be serviceable, when it breaks.

Are you saying I make sh**ty pistons!? just joking. As I said I don't want to make a small cal. gun but a marble gun would be nice but I don't know where to find good marbles that fit pefectly in 1/2'' or 3/4''.

Now for some reason I like the idea of the hpa pump mounted underneath.don't know why though.

Sticky_Tape wrote:Now for some reason I like the idea of the hpa pump mounted underneath.don't know why though.

probably because it would be convenient and the most sensible idea as far as bb coax... just a thought...

Well said, great minds think alike eh

elitesniper wrote:Well said, great minds think alike eh

Indeed

Well, since your in Canada eh, you could buy slingshot ammo.

Daisy brand 14mm glass marbles fit 1/2" type M copper pretty good.

I bought mine at walmart, but canadian tire has them also.

As for mounting the pump underneath the barrel, you won't be able to bring your weight to bear on the pump. This will limit the max pressure.

For example, a pump with a cylinder from 3/4"type M copper, will take an input effort of ~100 pounds to generate 200psi.

Have you ever used a bow with an 80+ pound draw weight?

If you dont want the bulky sprinkler valve, make a piston, though it would be harder. It would be really nice if you made into a marble sniper with a piston

After a little bit of contemplation I bought the stuff to make a piston gun now I need to know how to fill the gun through the little end of a blogun and I am wondering if I could make it have a 1/2'' barrel not the conventional way of making a under over or use a really short airsoft shotgun barrel see pics.

Now this is not for sure that I will use the stock I might just do a simple under over.

Can someone tell me how to fill a gun through the little end of the blowgun?

get a 1/4 brass tee.

I don't get it how would I use the brass tee?

so that you can fill from with a shrader then pilots from a blow gun.

I don't know for sure but doent the little end of a blowgun have 1/8'' threads? Could you give me a ms paint pic or somthing?

What elitesniper means is to attach the center portion of the 1/4" tee to the larger(1/4") end of the blowgun, one end of the tee to your coax and the other end to the schrader valve.