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Deathray MP now running on unregged 12 gram!!

Built a BB Machine Gun? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Re: 8g CO2 cartridges

Unread postAuthor: littlebro05 » Sat Aug 02, 2008 12:33 am

THUNDERLORD wrote:
littlebro05 wrote:... just then i tried to shove it in with a blow gun (teflon and brass fitting) and it contains soooo much pressure...


I hope you mean a pressure washer handle and not the standard blow gun I'm thinking of...nothing to mess with up close :shock: :?


Well you're right... i was wearing lab safety glasses in case... lol, note to self... not to mess with it.... i'm figuring out how to make some sort of pressure adaptor thingy...... although i'm still working on the not so compact ones at the moment XD... sorry if i did something bad :(
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Unread postAuthor: django » Thu Aug 07, 2008 7:23 am

Brian, mate I sent you a PM but got no reply yet?= I am going to start construction on one of these this weekend can you tell me what size T-Fitting you used (where the bbs are) and what size small 90 degree bend was used inside that T-Fitting.The last 3 BBMG's I made refused to fire correctly? so I am hoping this feeder will work correctly as yours does,I'll be running .177 bbs through mine the other thing is, with regards to that copper tube running from the front of the washer handle to the bottom of the T ,what are the fittings on the copper tubes ends?.Are they compression fittings?

One thing concerns me running unregged Co2!,how the hell can the seal in the washer handle possibly cope with the frozen co2 liquid?,did you buy another specialised seal. I dont know if my washer handle can take that punishment, its a 4000 psi handle made by SPECK.........
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 07, 2008 7:30 am

django wrote:One thing concerns me running unregged Co2!,how the hell can the seal in the washer handle possibly cope with the frozen co2 liquid?


Provided the feed is from the top of the cylinder and it's kept vertical, you should only get CO<sub>2</sub> gas in your system.
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Unread postAuthor: littlebro05 » Thu Aug 07, 2008 7:48 am

jackssmirkingrevenge wrote:
django wrote:One thing concerns me running unregged Co2!,how the hell can the seal in the washer handle possibly cope with the frozen co2 liquid?


Provided the feed is from the top of the cylinder and it's kept vertical, you should only get CO<sub>2</sub> gas in your system.


Well I just realise that instead of using what ever brian is using, why not just use a co2 bike pump as your blowgun. You can purchase ones such as...

http://www.amazon.com/Innovations-Ultra ... 949&sr=1-2

which should be compatible to any 12g co2 cartridges and releases a significant amount of air flow. You can use that as your blowgun and sitll get the same amount of firing time. Although they can be fairly expensive, but more convenient.

Just a suggestion though since thats what I'm aiming for at the moment and it's all in one part... not many. The parts he uses are too complicated for my brain haha.
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 07, 2008 7:53 am

littlebro05 wrote:Well I just realise that instead of using what ever brian is using, why not just use a co2 bike pump as your blowgun.


Great idea, and like many great ideas, already been done here - surprised that not many more people have done the same actually.
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Unread postAuthor: POLAND_SPUD » Thu Aug 07, 2008 8:07 am

pretty cool idea.... it seems that a gun made with it will have comparable power with the BBMG and will be much more compact

I wonder if it is possible to cut their ROF to about 5-10 / second with the use of an o-ring or something
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 07, 2008 8:12 am

POLAND_SPUD wrote:pretty cool idea.... it seems that a gun made with it will have comparable power with the BBMG and will be much more compact.


Indeed, the only reason I've never made anything similar is because I never found the trigger type inflator locally. I had started to make a P90 style BBMG with a tap type inflator epoxied to a cut down blowgun (see attached image) but it turned out to be leaky and I scrapped the whole thing. Looking to see if I can buy one online though :)

I wonder if it is possible to cut their ROF to about 5-10 / second with the use of an o-ring or something


I'm sure, though I'd go for a mechanical device in the interest of longevity and adjustability.
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Unread postAuthor: littlebro05 » Thu Aug 07, 2008 8:26 am

Haha yeah i saw it already.

The dude lives in south australia. I haven't talked to him on msn in ages. I was planning to make that really cool gun but never got arround to getting the parts it was pretty simple concept. I saw his gun on rotteneggs though not spudfiles lol.

jackssmirkingrevenge wrote:
POLAND_SPUD wrote:pretty cool idea.... it seems that a gun made with it will have comparable power with the BBMG and will be much more compact.


Indeed, the only reason I've never made anything similar is because I never found the trigger type inflator locally. I had started to make a P90 style BBMG with a tap type inflator epoxied to a cut down blowgun (see attached image) but it turned out to be leaky and I scrapped the whole thing. Looking to see if I can buy one online though :)

I wonder if it is possible to cut their ROF to about 5-10 / second with the use of an o-ring or something


I'm sure, though I'd go for a mechanical device in the interest of longevity and adjustability.


That trigger type i'd assume most bike stores would have em though. And you know the mechanical device link... If you were to put that thing upside down it would produce a backspin... a hop up :D. Just reading though if you put the spring on the bottom it will make the bb spin at a forward spin... which will make the bb go down.

I posted a thread somewhere in the bb discussion. If you remembered Kashmunni's hop up system... spring bb upside down... it'll produce a backspin AND decrease the ROF

Back to the co2 bulb part i think there maybe a lot of BBMG's powered by this "bike pump" soon.
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Last edited by littlebro05 on Thu Aug 07, 2008 8:37 am, edited 1 time in total.
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Unread postAuthor: POLAND_SPUD » Thu Aug 07, 2008 8:36 am

well if you consider all the advantages it seems that an inflator is rather cheap.. to build something like BtB built you would have to buy a 12g CO2 adapter and a pressure handle. Both of them would cost several times more than this....

I've made a very basic cloud BBMG and I am amazed... of course it took me one evening to spend 2000 BBs and the fridge compressor got pretty hot that day :wink:

I've seen all your threads about adjustable ROF for BBMGs and I am very interested in this idea.... has anyone build it ?

IMO the main drawback of BtB gun is that it can fire for up to 5 seconds or so when running on a 12g CO2 cartridge... I'd rather have a gun with a ROF of 10/second, more power per each shot and lower consumpiton of air/co2 (ok I know that's probably what 70%o f people here want)
if you make something like this with a co2 tire inflator + lead BBs you'd have a co2 powered PDW :D
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Last edited by POLAND_SPUD on Thu Aug 07, 2008 8:46 am, edited 2 times in total.
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 07, 2008 8:38 am

This looks like the project I've been looking for, might keep me amused in Spain :) looking for a suitable inflator as we speak.

If you were to put that thing upside down it would produce a backspin... a hop up Very Happy. Just reading though if you put the spring on the bottom it will make the bb spin at a forward spin... which will make the bb go down.


Look through the detent thread, the hop-up issue is mentioned ;)
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Unread postAuthor: trollhameran » Thu Aug 07, 2008 8:53 am

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Unread postAuthor: littlebro05 » Thu Aug 07, 2008 8:59 am



hoolllllyyyy crappppp, that is soooo friggin' cheap. Here in aus it costs like £5 a pop... so i had to use 8g soda bulbs since they're cheaper... i had to modify it though so the 8g would work in it.
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 07, 2008 10:22 am

Dammit, will no one ship one of these to my epoxy bat-cave? :cry:
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Unread postAuthor: Sticky_Tape » Thu Aug 07, 2008 10:27 am

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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: Necrosis » Thu Aug 07, 2008 1:56 pm

jackssmirkingrevenge wrote:
littlebro05 wrote:Well I just realise that instead of using what ever brian is using, why not just use a co2 bike pump as your blowgun.


Great idea, and like many great ideas, already been done here - surprised that not many more people have done the same actually.


This creation caused me to waste 12 bucks on a thing that sprayed for half a second.. it did hort.. the effing cardridge froze to my hand.. >:(
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