SpudFiles

So recently, I have gotten the amazing idea of creating a portable gas powered BB machine gun.


It started when I brought myself a Co2 tank from the Hardware store. (they’re used for nail guns). The pressure system that they are used for, are sadly discontinued for a reason that I am not aware of. So I decided to improvise.
I have made my own design using metal threaded piping that takes the same principle as SodaStream machines. Where pressing down on a button, pushes down on the nozzle button on the tank, releasing a burst of gas.


If there are any safety concerns in regards to the construction, please don’t hesitate to discuss them. Based on my logic and previous experience, I have a strong belief that the current structure is safe.
Here are some pictures.








The help that I am in need for is an idea for a mechanism to push the rod forward onto the Co2 bottle button.

At first I thought of using some form of pulley connected to a trigger, but the button is relatively stiff and would not be pushed very easily.

Another idea I had was to use some rubber tubing around the rod to pull it down, but I have no idea of how I could make the compression go backwards when I want to release the trigger.

My third idea was to use something that is powered by a motor. I just cannot think of a device that could do the trick, and that could fit onto my gun nicely.

What are your thoughts?

use a lever as a trigger, much in the same way blow guns work.

That would be the easiest way i can think of.

Hmm good idea. I know it may be asking for alot but is it possible if you could draw a diagram of it on the first picture?

I have an idea of what you mean, but words are often open for interpretation unlike diagrams.

I take it that the rod is pushing directly onto the safety pin (not sure of the real name) that is in the co2 bottle? So there isn't any valves other than what is included already in the tank? Neat idea. I can't tell which end is suppose to be the front in the first picture, the left or the right? It looks like there should be a barrel on the L joint running above the tank and going to the right, with the push button part where the bbmg would have a stock.

Lol. I definately wouldnt trust my skill with creating a secondary valve, simply because I do not like the idea of handling pressures over 2000 psi.

And yes you are correct in that the barrel will screw onto the L joint. I am planning on using a cloud design with 3 mm BBs (the same size as the ammo used in the BBMGs in shooting galleries at fairs)

I figured I could use a lever for a trigger (thanks jhalek90), but I would want the simplest way of attatching such a design to the current construction of the gun. Perhaps making a bigger woodden handle with some holes to attatch the lever onto.

did you get that Co2 from bunnings in oz if you did you need a valve to open close it right after the threads on the tank, those tanks have a burst disk once opened don't close i would use a pressure washer handle

I didnt quite understand what you were trying to say.

Sorry.

The tank already has an in built valve that only needs to be pressed to release the gas, and this gas gets release around the rod.

thats a lota zip ties, lol
very clean! good work

It looks like your tank has the treads commonly associated with paintball tanks. You may be able to pick up a paintball air system for cheap that will work with that.

Something like this

I doing something a but like this but a little bit different.


<a href="http://s878.photobucket.com/albums/ab34 ... 143646.jpg" target="_blank"><img src="http://i878.photobucket.com/albums/ab34 ... 143646.jpg" border="0" alt="Photobucket"></a>


<a href="http://s878.photobucket.com/albums/ab34 ... 143626.jpg" target="_blank"><img src="http://i878.photobucket.com/albums/ab34 ... 143626.jpg" border="0" alt="Photobucket"></a>



<a href="http://s878.photobucket.com/albums/ab34 ... -54-38.mp4" target="_blank"><img src="http://i878.photobucket.com/albums/ab34 ... -54-38.jpg" border="0" alt="Photobucket"></a>


VIDEO ^^^^^^^^^^^^^^

what pressure can one of those take?

_-J-O-R-D-A-N-_ wrote:Lol. I definately wouldnt trust my skill with creating a secondary valve, simply because I do not like the idea of handling pressures over 2000 psi.

You mean 850 psi.

I belive c02 is usually stored at 850 psi(room temp).

Mpeddlesden wrote:I'm doing something a but like this but a little bit different.

I think you've taken the idea of a "hammer valve" a bit too literally

ilovefire wrote:what pressure can one of those take?

=3,500 psi
=241.31 Bar

Its a bit.