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 72 users online :: 5 registered, 0 hidden and 67 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Help with BBMG

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

Help with BBMG

Unread postAuthor: COOL GUY » Thu Feb 18, 2010 8:46 pm

Ok i have come up with an awesome idea but have a few questions.
I want to build a inline vortex sub machine gun and want to power it with a 12 gram co2 cartridge in the handle.
my questions are:

What do i hook the co2 cartridge up to?

What trigger should i use?

What hose thingy should i get to hook up to the vortex block?

How much fps and rate of fire is expected from a 12 gram?

And would this work: http://www.rei.com/product/696553

THANKS FOR ALL YOUR HELP!

and by the way this is my first post. :lol:
  • 0


COOL GUY
Private
Private
 
Posts: 3
Joined: Thu Feb 18, 2010 8:27 pm
Reputation: 0

Unread postAuthor: POLAND_SPUD » Thu Feb 18, 2010 8:56 pm

BBMGs are terribly inefficient (meaning - they use a lot of air)... so don't expect 10 second continuous bursts with 12g cartridges

IIRC someone (probably BTB) has built a BBMG powered by 12g cart. and it could only fire for about 5 seconds or so...

I leave it up to you to decide if you want a gun that will empty the whole cartridge in a couple of seconds
  • 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: clemsonguy1125 » Thu Feb 18, 2010 9:34 pm

I agree, you have a couple of other options though, one you can hook it up to regulated co2 or hpa but the set up for that will cost over a 100 dollar, or you can hook it up to an air compresser
  • 0

User avatar
clemsonguy1125
Major General
Major General
 
Posts: 1485
Joined: Tue Jul 21, 2009 4:00 pm
Location: East Coast
Reputation: 1

Unread postAuthor: jackssmirkingrevenge » Fri Feb 19, 2010 12:32 am

Have a look at this one.

Brian's PNUZI is a bit more finely finished, and this is my own effort.
  • 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: Davidvaini » Fri Feb 19, 2010 4:58 am

  • 0

User avatar
Davidvaini
Major General
Major General
 
Posts: 1315
Joined: Tue May 29, 2007 8:58 pm
Reputation: 0

Unread postAuthor: COOL GUY » Fri Feb 19, 2010 5:59 pm

Code: Select all
Posted: 02/19/2010 3:58 AM    Post subject:
http://www.spudfiles.com/forums/bbmg-airsoft-magazine-and-hopup-design -t16151.html


and my own..


I love your design but i have a few questions.
What is that blue thing on the end of the inflator?
What did you use to connect the inflator to the hop up with?
And you used magnets to keep your magazine up?
Also could you post a video of it firing?

THANKS GUYS FOR ALL YOUR HELP AND HARD WORK ON YOUR PROJECTS!!!
AND REMEMBER THIS IS MY FIRST BBMG PROJECT SO...YEAH :D
  • 0


COOL GUY
Private
Private
 
Posts: 3
Joined: Thu Feb 18, 2010 8:27 pm
Reputation: 0

Unread postAuthor: Crna Legija » Fri Feb 19, 2010 9:57 pm

the first pic in davidvaini bbmg is just a photoshop pic of what he would make it look like
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Marffy » Fri Feb 19, 2010 10:47 pm

If it were me. o would not use a vortex or a cloud. i would use Davidvaini's direct feed bbmg style gun. it seems to be more efficient to me. The bb's are right there, in the barrel. while a vortex or cloud has a very short "warm-up" time for the bbs to bounce or spin around untill they get into the barrel.
  • 0

"Hard work has a future pay-off. Laziness pays off now."
User avatar
Marffy
1st Lieutenant
1st Lieutenant
 
Posts: 258
Joined: Mon Jul 27, 2009 2:03 pm
Location: earth
Reputation: 0

Unread postAuthor: Davidvaini » Sat Feb 20, 2010 2:07 am

sorry, I don't have a video of one of these, I built a prototype.. test fired it and it was great, Its just I have been out of co2's ever since.. I do plan on making another one.

Its really simple actually.. its an airsoft barrel, airsoft hopup unit, tire valve and co2 inflator.. in that order..

oh and of course the airsoft magazine...

Image

The tire valve is from a bike tire.. I just cut off some of the excess rubber until it was a tight fit into the hopup...

The hopup design is quite simple.. it has an air inlet, a bb inlet, and a barrel outlet.


The air just goes through the air inlet.. and the BBs are pushed up by a spiring in the magazine.. the BBs are pushed into the air stream coming from the air inlet.. the air stream then pushes those BBs out the barrel.


Now my design utilizes an airsoft hopup that puts backspin on the BB causing it to fly further.


With this coming up again, I think I am finally going to build one of these the right way.. and expierenment by putting an expansion chamber between the co2 inflator and the hopup.
  • 0

User avatar
Davidvaini
Major General
Major General
 
Posts: 1315
Joined: Tue May 29, 2007 8:58 pm
Reputation: 0

Unread postAuthor: COOL GUY » Sat Feb 20, 2010 11:30 am

Not to sound stupid but what is a expansion chamber and what does it do? Is it easy to build?
:wav:
  • 0


COOL GUY
Private
Private
 
Posts: 3
Joined: Thu Feb 18, 2010 8:27 pm
Reputation: 0

Unread postAuthor: Davidvaini » Sat Feb 20, 2010 12:27 pm

COOL GUY wrote:Not to sound stupid but what is a expansion chamber and what does it do? Is it easy to build?
:wav:


I'm not even sure if it will work.. but I'm just theorizing that it will help performance...

An expansion chamber is just a chamber that is slightly larger.. it allows the compressed air, gas, etc.. expand to create more volume and less pressure..

More volume = longer firing times
less pressure = less velocity

but velocity seems good enough right now considering I have an excess in pressure (unregged co2)
  • 0

User avatar
Davidvaini
Major General
Major General
 
Posts: 1315
Joined: Tue May 29, 2007 8:58 pm
Reputation: 0

Return to BB/Airsoft/Pellet Gun Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'