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How to Make a Full Auto Airsoft Minigun [Halo Inspired Mobile Turret]

video How to Make a Full Auto Airsoft Minigun [Halo Inspired Mobile Turret]

This is a type of cloud airsoft gun - named so because of how the pellets are blown around the reservoir before being fired out the barrel. Since there is nothing mechanical to get in the way of the workings of this gun the rate of fire is extremely high, an estimated 50 rounds per second. It would make a great airsoft turret to be mounted on the defensive wall of a home base.

The price of materials is just over $50 assuming the builder already has PVC primer and cement.

Parts List:
-------------------------------------------------------------------------
4' of 2" pressure rated sch40 PVC
4' of 1.25" pressure rated sch40 PVC
2" end caps x2
2" 90 degree elbow
2" 90 degree street elbow
1.25" end caps x3
1.25" couplings x2
1.25"x0.5" threaded reducer
0.5" threaded plug
6mm ID x 3' aluminum tube
Rubber tire valve
Air compressor blower valve w/ threaded ends
Close brass pipe nipple - to fit blower valve
Hose fittings - to fit blower valve - x2
1' air compressor hose - matched to hose fittings
Hose straps - for compressor hose - x2
Large hose straps
1" foam pipe insulation - or a wood block fitted for chamber support

187 comments

1-40 of 187

May 11, 2012. 6:46 PMcorn holio says:

how many psi did you use and how many fps did you get

May 6, 2012. 8:12 PMblack hole says:

Heh heh heh.

Feb 9, 2012. 3:39 AMMathieu17 says:

Can i use a CO2 tank??? would that work or shoot for a long time... and would there be a way too have more bb's to shoot??

Apr 10, 2012. 2:50 PMinvincible airsoft says:

in theory it should work with co2. if you make the bb resovoir bigger/ longer it should hold more bb's.

Feb 29, 2012. 4:34 PMrafa101 says:

How much would you be spending on materials? thank you

Apr 10, 2012. 2:20 PMinvincible airsoft says:

around $60

Mar 11, 2012. 9:07 AMweaponmaster1 says:

Go to this link now http://www.instructables.com/answers/Airsoft-gun-102/

Mar 4, 2012. 10:13 AMowlart101 says:

Very nice, I plan on making this with my Dad. Do you have any suggestions for making it more of a flamethrower version, with the air reservoir in a backpack or something?

Mar 4, 2012. 11:08 AM

NightHawkInLight (author) says:

Yes. http://www.instructables.com/id/Make-a-4-BB-Gun-Airsoft-Flamethrower/

Mar 5, 2012. 3:32 AMowlart101 says:

Thanks, right after I saw this 'ible I went to look at you'r ohers and my question was automatically answered.

Feb 28, 2012. 7:20 PMdjzadjza says:

hey nighthawk. im a big fan. great ible. i love the idea. How long do the tanks hold pressure before bbs dont fire well anymore? how far can this weapon shoot?

Feb 28, 2012. 1:09 PMTiger1509 says:

I am going to make one for my team, Thanks for the Intel.

Feb 19, 2012. 6:32 PMmotomax99 says:

this looks awesome, i like the m1919 appearance you gave yours, im gonna try to do the same with mine but i wanna get more psi in the air tank, any suggestions? i also wanna do a shoulder fired 1919 like they did on sons of guns, is this easily modifiable to shoulder fire?

Feb 19, 2012. 7:26 PM

NightHawkInLight (author) says:

If you want more pressure the only way to safely go about it is to use something other than PVC. Copper or welded steel would be a good choice.

Feb 19, 2012. 7:55 PMmotomax99 says:

so the same sized tank just copper? ya that would probably work. and what do u think about the shoulder fired modification? could i just put on a wood stock?

Jan 27, 2012. 3:42 PMladieslilman98 says:

do you think it would work with paintballs(obviously a larger barrel ) would you have to get a higher pressure rated pipe and mupm it higher, or leave as is?

Feb 12, 2012. 6:56 PM

Matrix-technician says:

I would imagine that could be possible, however unlikely. The paintballs themselves might be too heavy to float around in the resovoir, also the might not be able to handle the pressure, rupturing before leaving the barrel.

Feb 3, 2012. 10:13 AMKelpbot says:

I have some extra airsoft AEG barrels lying around, and I was thinking of building a minigun similar to this, but I'd use a 1.5' barrel rather than a 3' barrel. Do you think it would still have good accuracy?

Feb 3, 2012. 1:29 PM

NightHawkInLight (author) says:

It's not going to have great accuracy no matter what, but it sprays so many pellets that doesn't matter. I don't think a shorter barrel will hurt anything. You also don't need to use an aluminum barrel as I do. For a few dollars you can buy a brake line at an auto parts store that has fittings to thread into the PVC rather than being glued in.

Feb 2, 2012. 5:29 PMAirsoftgeek says:

This is AMAZING

Feb 2, 2012. 4:04 PMThe Red Afternoon says:

Is there any instructions you have for making extra tanks?

Jan 26, 2012. 12:42 PMBtorres123 says:

Hey can u make me one but except airsoft can u make it for metal bbs. If possible please email me and I'll pay $80 plus shipping

Jan 26, 2012. 1:17 PM

NightHawkInLight (author) says:

Nope, sorry. That would likely be illegal.

Jan 21, 2012. 6:50 PM

Aron313 says:

Can you make the air tank into a backpack so that you only need to carry the bbs and barrel part. And have you found out how many fps or rps this gets. It looks crazy fast. I made one that hooked up to my compressor and it shot fast but now i have to make it portable with the air tank.

Jan 23, 2012. 3:15 PM

NightHawkInLight (author) says:

Yes, you can use a backpack tank.

Jan 24, 2012. 3:16 AM

Aron313 says:

Thanks!

Jan 23, 2012. 2:14 PM

Aron313 says:

If you can please tell me because i really want to make one and i want to make sure it will work! :)

Jan 11, 2012. 8:15 PMcurious youth says:

hi im making this but im in australia sadly airsoft pellets are not available over here (or not that i have found anyway)
i was wondering if small pebbles about the same diameter would fire out ok?

Jan 11, 2012. 9:20 PM

NightHawkInLight (author) says:

No, that would damage and jam the barrel. You may be able to fire dried peas or some other type of round seed, just make the barrel slightly oversized so that none of them are too big for it. It won't be as powerful as this is, but it will fire.

Jan 12, 2012. 2:42 AMcurious youth says:

ok then so no pebbles not even round smoothed ones ? how about metal bbs. i can source them out of old machine parts or are those to rough? i really want power hahahahaha

Jan 21, 2012. 6:54 PM

Aron313 says:

If the rocks can fill the tube so that it wont let air through the side it may work but as NightHawklnLight said it will scratch the barrel and probably wont fire but you can try. I tryed in my small pistol and it wouldnt work.

Jan 22, 2012. 1:49 AMcurious youth says:

ok then thanks. you reckon metal bbs would do it ? or would i need a stronger material for mine ?

Jan 22, 2012. 6:04 AM

Aron313 says:

Yes that would work but the barrel would need to be the size of the metal bbs.

Jan 22, 2012. 4:27 PMcurious youth says:

Alright yay thanks

Dec 28, 2011. 11:23 AMdeath192333 says:

I made the turret and it works great! How many bb's would you suggest per load, and what weight? Also for those wanting a flamethrower version, I did not mount the barrel to the pressure chamber, and used a 2' hose instead of the 1' suggested. Then I attached two ropes tide in a circle, as shoulder straps. Boom, instant flamethrower.

Dec 28, 2011. 12:13 PM

NightHawkInLight (author) says:

I had to play with the amount of pellets to make it fire right. About half way full worked best for me. Both .12g and .2g work fine.

If you have a minute I would really appreciate a vote for my How to Make a Fire Wire instructable in the Make it Glow contest :)