Picture of Double Barrel Machine Gun
This is a BB machine gun I made. It has two seperate inline vortex blocks inside and fires 6MM airsoft bbs. The gun and tripod are made completely of PVC pipe or sheet and hot glue with the actual innards made from wood and metal. The body is 4" PVC and the barrel shrouds are 3/4". The tripod is also 3/4" PVC pipe. I ran out of spray paint so I can't paint all of it right now. I am also planning to build a .177 cal minigun in the near future. 
conjs1 year ago
Don't paint all of it it looks great like that :)
I think this is amazing but how does it work?
bombmaker2 (author)  airsoftredneck962 years ago
It functions just like a simple vortex block machine gun, but everything is doubled up. So it is really just two guns put into one case.
hey do you think u could post an ible id love to make this?
bombmaker2 (author)  fatperson12392143 years ago
Sorry, but since I posted this, I've dismantled this to use the parts in other projects. It shouldn't be to hard to build anyway. All it really is is two normal vortex block machine guns put together.
aww thx anyway
spencer424 years ago
One more question, what kind of fps does it get at what pressures, I am on the fence between making a single or double and I wanted the double due to the high rof and the single due to the higher fps, but if they are similar fps then I will go double. Thanks!
bombmaker2 (author)  spencer424 years ago
Sorry, but I can't tell you that. I don't have a chronograph so I have no real way of knowing.
spencer424 years ago
i came up with a similar idea last night and i was searching in google for similar things and i found this, nice job! just one question could you take a picture or explain to me where the bbs go, the one that i was thinking of was fed by a large weak spring so if you could explain that it would be great. nice job!
bombmaker2 (author)  spencer424 years ago
The space you see behind the vortex blocks is filled with bbs. A large weak spring with a block of wood keeps them pressed towards the vortex blocks.

Also, thank you!
ilpug4 years ago
pretty amazing. im making something similar to this, and like the idea of wooden vortex blocks. might go try this now. this would be great if it just a few more steps, and maybe some simple drawings to illustrate how it works.
bombmaker2 (author)  ilpug4 years ago
Yeah unfortunately though I had built this before the thought of Instructable even crossed my mind.

Also if you use wood I'd suggest sleeving the hole with PVC because I don't know how much abuse the wood will take by itself.
will do. im going to try to use mine in conjunction with a portable battery air compressor and backpack tank.
bombmaker2 (author)  ilpug4 years ago
Good look with that and don't forget to take pictures!!!
awesome right now im building an airsoft minigun
cam.dav324 years ago
Nice job, i never thought of using two vortex blocks before, its a good idea, must eat BBS up at a massive rate.

Oh and if you want to make it a bit more portable you could; get a car battery run smallish compressor, and a car battery, connect them up to your gun and store them beside your gun in a box designed to look like an ammo box, it would mean it would be sorta portable, iv seen some guys do it before its pretty impressive if it works.
bombmaker2 (author)  cam.dav324 years ago
Yeah it does eat a ton of BBs. That's why I load it with ultra-cheap .12g.

That sounds like a great idea, but I built it mostly for show and doing all that really isn't for me.
kve234 years ago
you should add a filling hopper thing or someting so you dont have to remove the endcap to reload it.
kve23 kve234 years ago
i made a mini one that is a fourth of the size and looks different but uses the same principle. its a great idea.
bombmaker2 (author)  kve234 years ago
Nice and thanks. The way that this one functions is very simple and basic compared to other mechanisms. Check out Spudfies for other ideas. There are some really good ones there
bombmaker2 (author)  kve234 years ago
The only reason I didn't is because the space behind the vortex blocks holds a ton of bb's.
kve234 years ago
how does it work?
bombmaker2 (author)  kve234 years ago
If you look at the second picture, you will see two blocks. They are vortex blocks. Those spin the bb's around very fast until they line up with the barrel and shoot out. The bb's are all around these vortex blocks and are kept around them by a spring in the endcap.
but how does it spin them around?
bombmaker2 (author)  kve234 years ago
There is an air compressor spraying high pressure air into the vortex blocks.
i get it now. thanks
bombmaker2 (author)  kve234 years ago
Your welcome.
Nice one!
bombmaker2 (author)  RMConstruction4 years ago
make an ible for it