Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 70 users online :: 3 registered, 0 hidden and 67 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Home made co2 Airpistol?= need help / ideas

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
Sponsored 
  • Author
    Message

Home made co2 Airpistol?= need help / ideas

Unread postAuthor: django » Sat Jan 23, 2010 5:44 am

Well guys, For years ive wanted to make a co2 Powered Airpistol, preferably Semi Auto= over the years ive googled and tried to come up with a way to do it but still not been able to do so! :roll: .

I have a few mates that have wanted an Air Pistol for a long,long time and I get asked a lot if Ive been able to make one yet!? here in Australia I cant get Co2 Airpistol internals to use for construction so have to come up with some other way?.

I was thinking of somehow modifying a co2 bike inflator to a hammer valve but I dont think it can be done and also they only output at 100 psi or so from memory?. I wanted to have the pistol shooting the co2 at full 800 psi pressure as per .177 co2 pistols do, I dunno maybe its not possible? any help MUCH appreciated


also looking for air pistol schematics to help try figure out how I can make such a pistol? , ive not found much so far

http://www.pyramydair.com/schematics/rwsmodelc225.asp
  • 0


django
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 410
Joined: Sat Feb 12, 2005 11:33 pm
Location: Australia
Reputation: 0

Unread postAuthor: Lex » Sat Jan 23, 2010 6:01 am

Maybe something like this or that?

But be warned, unregged CO2 is nothing to play around with if you don`t know exactly what you are doing!
  • 0


Lex
Private
Private
 
Posts: 6
Joined: Sun Jan 17, 2010 3:23 pm
Reputation: 0

Unread postAuthor: inonickname » Sat Jan 23, 2010 6:12 am

What kind of materials and facilities do you have available? If you have a decent shop setup I'll dig up a few links for you.
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Re: Home made co2 Airpistol?= need help / ideas

Unread postAuthor: jackssmirkingrevenge » Sat Jan 23, 2010 6:27 am

django wrote:I was thinking of somehow modifying a co2 bike inflator to a hammer valve but I dont think it can be done and also they only output at 100 psi or so from memory?


As far as I know they give the full pressure, I took apart my ultraflate and it looks like a simple sprung ball pushed down by a pin, no sign of any regulation.

I think the easiest possible solution that gives good performance would be to combine an inflator with a tee breech. The lowish flow rate of the inflator would be negated by the seal/detent that would hold the BB in until a certain pressure was reached at that point if would be the equivalent of a burst disk valve. Not sure if you have airsoft magazines avalable but I reckon Davidvaini had the right idea :) not to mention you technically have the option of full auto as long as the trigger is pulled.

You could also conceivably replace the trigger with a hammer if you want a "proper" semi-auto, are cap guns legal down under?
  • 0

Attachments
inflatorpistol.JPG
inflatorpistol.JPG (16.65 KiB) Viewed 8333 times
co2inflator.JPG
co2inflator.JPG (8.83 KiB) Viewed 8333 times
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: POLAND_SPUD » Sat Jan 23, 2010 7:54 am

@jsr
yeah I guess he was right...
though I think it would be more practical if you build one with a small QEV or 3 way valve as the main valve (IIRC you have one, right ?)

you could even use the pneumatic fullauto / timer circuit as the main valve...
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: jackssmirkingrevenge » Sat Jan 23, 2010 8:01 am

POLAND_SPUD wrote:though I think it would be more practical if you build one with a small QEV or 3 way valve as the main valve (IIRC you have one, right ?)

you could even use the pneumatic fullauto / timer circuit as the main valve...


Hard to fit in a pistol sized package though eh?
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: django » Sat Jan 23, 2010 8:22 am

Yeh we Are allowed cap guns but NO Airsoft gear at all, the joys of Aussie Gun Laws :roll: as far as I was Aware those inflaters were regulated down!?. Maybe specific ones are?, I looked on the packaging of one here and im sure it said it only output at 100 psi? so I never ventured that way with one for a Pistol.

I had thought of a 1/8 Qev and Poppet valve like my Pitbull 9 Rifle( that uses 1/4 gear though) BUT I wanted the pistol to take full co2 psi as being a pistol the barrel will be small so power will be very low unless full co2 pressure is utilised.....
  • 0


django
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 410
Joined: Sat Feb 12, 2005 11:33 pm
Location: Australia
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: POLAND_SPUD » Sat Jan 23, 2010 8:26 am

well not really... the valve that I used in that experiment was the only one I could get at that time... so it wasn't very compact

5mm valves are smaller than a box of matches... 1/8" valves are almost exactly the size of a box of matches.. 1/4" ones are slightly smaller than a box of cigarettes

so it wouldn't be that difficult to put a 1/8" valve into the pistol grip
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: urgle the danish cow » Sat Jan 23, 2010 8:36 am

jacksmirkingrevenges idea works very well. a friend and i did the same thing some time ago and it worked well except for it shoots full auto and you have to reload constanly. it also works well if you bend a small section of tubing up and around ( so then on top of the bike valve) into a bb chamber and just a bbmg from there. resulting in a very small pdw airsoft smg. then agian thats not semi-auto. just throwing it out there
  • 0

User avatar
urgle the danish cow
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Sun Jul 26, 2009 4:48 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sat Jan 23, 2010 9:19 am

Time to put my money where my mouth is, I'm should give the inflator + tee breech a go :)
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: qwerty » Sat Jan 23, 2010 10:18 am

How many shots do you think you could get with one cartdridge? I might give it a go if it's not to money consuming.
  • 0

I visit occasionally to make unrelated posts.
User avatar
qwerty
Colonel
Colonel
 
Posts: 677
Joined: Sun Apr 12, 2009 2:16 am
Location: Evesham, Worcs
Country: United Kingdom (uk)
Reputation: 0

Unread postAuthor: django » Sat Jan 23, 2010 10:51 am

Yeh I tend to think it will spit out more than one BB at a time Jack!, but if tolerances are tight then maybe its possible?,Id love to be able to finally crack the making of a High Powered co2 Air Pistol. Not only would I be be happy but my friends would finally have an Co2 Air pistol!, if construction was easy enough that is?
  • 0


django
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 410
Joined: Sat Feb 12, 2005 11:33 pm
Location: Australia
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sat Jan 23, 2010 10:54 am

I'm giving it a whirl as we speak, will post when I have something worthwhile.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: qwerty » Sat Jan 23, 2010 12:08 pm

Try making an inline hammer valve (abit like an XRV) i'll post a pic of mine an a bit.
  • 0

I visit occasionally to make unrelated posts.
User avatar
qwerty
Colonel
Colonel
 
Posts: 677
Joined: Sun Apr 12, 2009 2:16 am
Location: Evesham, Worcs
Country: United Kingdom (uk)
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sun Jan 24, 2010 12:15 pm

Here's a preview of the prototype for this idea curing, it's all pretty ghetto but as just a proof of concept prototype, it "only" has to work :P :wink:

I'm also making an extended chamber with a schrader fill valve and half a used CO<sub>2</sub> bulb so there's extra air capacity and I don't have to spend money on cartridges in the off chance that it works ;)
  • 0

Attachments
Image209.jpg
Image209.jpg (18.17 KiB) Viewed 8187 times
chamber.GIF
chamber.GIF (6.88 KiB) Viewed 8185 times
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Next

Return to BB/Airsoft/Pellet Gun Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot]

Reputation System ©'