This is my latest project, the body is based (loosely) off of the KRISS smg.
SPECS:
Firing pressure: 75 psi via pop off valve.
Firing valve: 1/4'' QEV.
Chamber: Co2 tank, used as air tank.
This gun use a QEV modded for full auto, with a 75psi pop off valve, to pulse air from an old co2 tank, into a small could chamber.
Each pulse fires aprox 12-20 bbs, the chamber will hold about 150.
Video:
[youtube][/youtube]
The shell of the gun was made from 2 sheets of 1/2'' thick abs plastic that i got from work. The shell is not yet compete, but i thought i would see if anyone had any ideas for improvement on the overall design.
*video* KRISS bbmg pulsed cloud design.
- wyz2285
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sounds great , but if it fires 12 bbs every time, how is the accuracy?
CpTn_lAw wrote: "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? "
- clemsonguy1125
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Looks cool, how did you cut the plastic?
That is all.
Sometimes, but not very often. and when it does jam, a little shake fixes it.jrrdw wrote:Do you get any jamming problems with a full load of BB's?.
Its about as good as any other BBMG with a 4'' barrel.wyz2285 wrote:sounds great , but if it fires 12 bbs every time, how is the accuracy?
i can hit a pop can from 25 feet
With a jig saw, a drill, and a dremel.clemsonguy1125 wrote:Looks cool, how did you cut the plastic?
jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?
POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
- jackssmirkingrevenge
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Interesting. Quite a short barrel you got there, pressure needs to be upped
Shame about the multiple BBS per pulse though.
Have you seen the Umarex Steel Storm magazine?
It combines a BB chamber with a spring loaded magazine, so you get high capacity which requires no mag changes or extra BB pouring.
We had discussed this concept a long time ago on Spudtech (large BB chamber feeding a smaller firing chamber to reduce losses due to dead space.) but nothing came out of it.
Shame about the multiple BBS per pulse though.
Have you seen the Umarex Steel Storm magazine?
It combines a BB chamber with a spring loaded magazine, so you get high capacity which requires no mag changes or extra BB pouring.
We had discussed this concept a long time ago on Spudtech (large BB chamber feeding a smaller firing chamber to reduce losses due to dead space.) but nothing came out of it.
hectmarr wrote:You have to make many weapons, because this field is long and short life
Jack, I would love some more info on how that magazine works.
Possibly a diagram?
Possibly a diagram?
jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?
POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
- jackssmirkingrevenge
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This is basically how I understand it:jhalek90 wrote:Possibly a diagram?
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hectmarr wrote:You have to make many weapons, because this field is long and short life
okay, i assume the air enters the bottom tube at someplace behind the bb's...
would that be correct?
would that be correct?
jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?
POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
- jackssmirkingrevenge
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That is just the magazine feed, I assume it has some sort of ratcheted hammer mechanism to release the air. Still waiting for someone *cough* to find the time to dismantle hisjhalek90 wrote:okay, i assume the air enters the bottom tube at someplace behind the bb's...
would that be correct?
hectmarr wrote:You have to make many weapons, because this field is long and short life
Ahh, I see now. I was confused.
So it's like a hopper, feeding into a magazine.
Seems like a decent idea to me.
I might build a pistol with that concept...
Edit: as for a use in this design, you were talking about a large"hopper" feeding into the bb chamber, possibly via a ballvale or something similar...If I understand correctly.
Sounds like a good idea, I could replace one of the pipe nipples on the chamber with a "t" fitting that goes to a hopper/ball valve.
So it's like a hopper, feeding into a magazine.
Seems like a decent idea to me.
I might build a pistol with that concept...
Edit: as for a use in this design, you were talking about a large"hopper" feeding into the bb chamber, possibly via a ballvale or something similar...If I understand correctly.
Sounds like a good idea, I could replace one of the pipe nipples on the chamber with a "t" fitting that goes to a hopper/ball valve.
jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?
POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
- jackssmirkingrevenge
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You could potentially use a large three way ball valve, and the inside of the ball valve could be the "firing chamber".
_______[BB hopper]
____________::
[barrel]---[ball valve]---[air source]
_______[BB hopper]
____________::
[barrel]---[ball valve]---[air source]
hectmarr wrote:You have to make many weapons, because this field is long and short life