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?
![Very Happy :D](./images/smilies/icon_e_biggrin.png)
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? "
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- 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?
![Smile :-)](./images/smilies/icon_e_smile.png)
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 ![Very Happy :D](./images/smilies/icon_e_biggrin.png)
Shame about the multiple BBS per pulse though.
Have you seen the Umarex Steel Storm magazine?
![Image](http://airgun-academy.pyramydair.com/blog/wp-content/uploads/2010/10/10-11-10-01-Umarex-Steel-Storm-magazine-loaded.jpg)
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.
![Very Happy :D](./images/smilies/icon_e_biggrin.png)
Shame about the multiple BBS per pulse though.
Have you seen the Umarex Steel Storm magazine?
![Image](http://airgun-academy.pyramydair.com/blog/wp-content/uploads/2010/10/10-11-10-01-Umarex-Steel-Storm-magazine-loaded.jpg)
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?
- Attachments
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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?
![Wink ;)](./images/smilies/icon_e_wink.png)
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