SpudFiles

i built it for use in airsoft matches, basically its a giant shot gun, i use what i think is called coaxial rounds, but i may be wrong, its a coffee filters filled with bbs that opens up and they o every where

Is that epoxy putty holding it together? And how powerfull is it with such a smll firing chamber? WTB Damage pics

yea its epoxy, im looking for that color paint that looks military green, like the kind on real panzerfuasts, it shoots about 300 fps on 90 psi, thats what i normally use goes about 20m. and like 1000fps at 200psi(complete overkill to use if your pissed at the other team ) ill pu some pics of some ammo i use and damage

Ehhh, that's pretty cool...the whole big tank/little tank thing. You do realize each shot will get progressively less powerful don't you? If you could somehow get a regulator between the big and little tank and limit the shots to say 20-30 PSI, you could get all consistant shots, save maybe the last one. Also if you had made the big tank even bigger with a larger diameter, it would last longer still.

But, it's simple and reasonably effective. The epoxy is probably a little overkill, but it actually seems to give it a little character.

covey12 wrote:yea its epoxy, im looking for that color paint that looks military green, like the kind on real panzerfuasts, it shoots about 300 fps on 90 psi, thats what i normally use goes about 20m. and like 1000fps at 200psi(complete overkill to use if your pissed at the other team ) ill pu some pics of some ammo i use and damage

200 psi?!?!? all i can say is be carefull, thats isn't safe for the kind of pvc you're using

btw, nice build, welcome to spudfiles

covey12 wrote:complete overkill to use if your pissed at the other team

No, if it's truly doing that velocity, it is not[/b] to be used on the other team for any reason whatsoever.
That kind of velocity, even with plastic BBs, can be lethal.

However, I have doubts it is actually doing that. Assuming the 300fps/90 psi figure is correct, as a rough guess, I would expect about 450 fps from 200 psi, based on energy/force comparisons.

Ragnarok wrote:

covey12 wrote:complete overkill to use if your pissed at the other team

No, if it's truly doing that velocity, it is not[/b] to be used on the other team for any reason whatsoever.
That kind of velocity, even with plastic BBs, can be lethal.

However, I have doubts it is actually doing that. Assuming the 300fps/90 psi figure is correct, as a rough guess, I would expect about 450 fps from 200 psi, based on energy/force comparisons.

actually it does shoot 1000 fps, becuz at 200 psi i dont use the slug round, i use a shell like sgtmik did, its a big tube, with cut up pens in it that fits snug ly in the barrel, only the bbs leave the shell, the shell doesnt shoot more than about 2feet, and at 1000 fps i only use it for sniping, not up close, maybe about 50yds

FishBoy wrote:

covey12 wrote:yea its epoxy, im looking for that color paint that looks military green, like the kind on real panzerfuasts, it shoots about 300 fps on 90 psi, thats what i normally use goes about 20m. and like 1000fps at 200psi(complete overkill to use if your pissed at the other team ) ill pu some pics of some ammo i use and damage

200 psi?!?!? all i can say is be carefull, thats isn't safe for the kind of pvc you're using

btw, nice build, welcome to spudfiles

the pvc i got can max up to 330 psi, so i thought that was safe, is it?
i havnt had ny problems yet except the epoxy blew a hole so some air comes out unfortunatley i gotta saw it off
IF ANYONE DECIDES TO MAKE THIS DONT USE SLIDING PARTS, USE ALL THREADED SO IT WONT LEAK, THE LEAKS WILL PISS YOU OFF just thought id share

covey12 wrote: actually it does shoot 1000 fps, becuz at 200 psi i dont use the slug round, i use a shell like sgtmik did, its a big tube, with cut up pens in it that fits snug ly in the barrel, only the bbs leave the shell, the shell doesnt shoot more than about 2feet, and at 1000 fps i only use it for sniping, not up close, maybe about 50yds

I have doubts...Even my 6mm pneumatic coaxial pumped at 250 psi didn't manage to get past 1000 fps... I had to pump it to 350 to achieve 1300 fps.

Maybe a chrono reading?

Still, great for a first have fun with that bad boy huh

looks like fun. i wouldn't take it to the field though. put a mag system on it and it's ready for combat. it's a nice first.

I like the shot repeter system!

its cool and so simple!

you could add a breech loader system and you will have an semi auto shotgun

EDIT: if you wanna keep the same velocity at each shot, reduce at each time the number of bb's in your round.