BB Machine Gun(NOT AIRSOFT!!!!!)




Introduction: BB Machine Gun(NOT AIRSOFT!!!!!)

This BB machine gun is powered by an air compressor and can shoot about 500 BB's in a couple of min. Fairly accurate and has a range of about 200 feet!!! Slices, dices, and rips em' new ones!

Step 1: The Parts

First off, this is not an easy build, it takes patience and craftsmanship to get it all together.

The parts I used on this gun are pvc pipes (rated at least 400 PSI!)Including the pvc drain trap and all reducers/splicers.

All of the brass fittings need to be npt(national pipe thread)I used 3/4".

As for the stock and the barrel, the came off an old pump action bb gun, but those were just to make it cooler.

The trigger is a blow gun, and the laser sight is optional.

The most important part of this is the VORTEC BLOCK, which itself takes some time to make.

Step 2: Vortex Block

The basic theory of operation of the gun uses a vortex block that when air pressure is applied it spins the bbs around very fast untill one of them lines up with the barrel and flies out of the gun.

The link below describes in detail how to construct a vortex block, its kind of like a powerball machine on crack.

vortex block

Step 3: The Gun

With this gun you can make your own design or copy mine.

Cut all of your pvc out and dry fit before gluing together with pvc cement.
The butt of the gun is attached with a long bolt with rubber washers inside of the drain to prevent air leaks. And a bondo spacer to match the parts shapes together.

I attached the blow gun using plumbers tape.

I will be adding to the actual construction process soon!



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    256 Discussions


    3 years ago

    The ones in the Civil War I believe was steam powered


    3 years ago

    In electric motor has been tried in the past and work very well as a matter fact larger ones were built during Civil War and shop marble size balls! Can you say meat grinder ! Lol
    Definitely something you don't want to be down range of


    3 years ago

    But here's another idea as far as being silent try using a small electric motor some of them spin extremely fast


    3 years ago

    My advice is to forget the silencer it wouldn't be worth the headaches

    Pvc itself shouldn't be taken far above 100-120PSI. DWV (drain waste ventilation) is even worse as far as pressure ratings. Most DWV fittings such as the one you used as the chamber isn't suitable for pressure at all. Those types of parts aren't quite made for pressure applications. Be safe!

    Well there's a lot of things that are different between our countries. You should come to Rye, NY and visit a place called "Play Land". Inside Play Land you can find a little booth to shoot co2 powered BB Guns that are machine guns but they are Co2 powered. A gas powered machine. No flaming powder. They are classified as AIR GUNS and as such do not use Fire. They shoot. However if you are talking expressely in terms of Silencers being Legal For Guns, the answer is No. Originally I thought there was discussion as to weather or not this BB Gun was a fire arm. Clearly it is not. It uses compressed to a tank gas to shoot. At any rate it looks like a fun Toy. You should not use a silencer with it. Rats will never know what hit them. Bye!

    2 replies

    My personal understanding is that you legally CAN suppress it in the US as long as the suppressing part is not removable.

    Dude if you want a silencer in the U.S. You can apply to the BATF for licencing. Its pretty much the same requirements as for manufacture of firearms.Or so I found while I was there. You can do the same thing here in Australia except the requirements are stricter. Also Australians beware airsoft and air/co2 powered weapons are legally classified as firearms so if you want to use this stuff please be on the lookout for the johnnies

    im 13 i under stand all the cocepts and engineering of the design but due to my age some parts are hard to come by could i substitute some of the parts and maybe funnel the entrance for the bbs in the vortex to reduce jamming?

    im 13 i under stand all the cocepts and engineering of the design but due to my age some parts are hard to come by could i substitute some of the parts and maybe funnel the entrance for the bbs in the vortex to reduce jamming?

    Sorry the path is: ==> Build Your Own ===> BB Machine Gun (pneumatic)

    Which is mentioned in step 2.

    Click on the hyperlink "vortex block".