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Finished 3 Barrel Grenade Launcher

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Finished 3 Barrel Grenade Launcher

Unread postAuthor: Davidvaini » Sat Jun 21, 2008 7:36 pm

Here is my finished 3 Barrel Grenade Launcher! It fires the preloaded cartridges that I made. The barrels rotate, It has a g36 stock, wood furniture, 1911 Pistol Grip, and a rotating barrel assembly. The barrels are 2 Inch barrels with 1.25" Preloaded cartridges. It fires off a co2 inflator on the field and overall I'm very happy with the outcome.

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So Plz Tell me what you think!
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Last edited by Davidvaini on Sun Jun 22, 2008 2:25 pm, edited 1 time in total.
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Unread postAuthor: SpudFarm » Sat Jun 21, 2008 7:39 pm

so freaking nice, clean, well built, nice painted and nice builder ( :D ) gun is it a long time since i have seen here.

good job.

and vids?
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Unread postAuthor: pizlo » Sat Jun 21, 2008 7:40 pm

I think its loverly! So you run it off a tire inflator or a cO2 setup? You rotate the barrels manually?
Wait... I'm an idiot, wheres the valve... WTF?
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Unread postAuthor: SpudFarm » Sat Jun 21, 2008 7:43 pm

pizlo: it is a cartrige with a burst disk in. he just set them in the end of the barrel and fill them. (i think)
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Unread postAuthor: Davidvaini » Sat Jun 21, 2008 7:45 pm

lol pizlo if you look at my preloaded cartridge design you would understand.

Valves are burst disks and actually the lack of weight of the cartridges being removed/fired actually rotates the barrels. I can however rotate the barrels manually if I wanted to.
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Unread postAuthor: pizlo » Sat Jun 21, 2008 7:53 pm

Just read that topic, and yes now I understand. You have now added another thing on my to do list. Really Ingenious design. Props.
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Unread postAuthor: Lentamentalisk » Sat Jun 21, 2008 7:59 pm

Soo sweet! How did you get the whole fill mechanism to work, with the rotating barrels, Does the rotation itself lock the fill onto the schrader valve, or do you have to push it in or what?
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Unread postAuthor: blind909 » Sat Jun 21, 2008 8:57 pm

Awsome job man, one of the nicest, cleanest, and simplest guns on the site. one thing though, where is the co2 inflator? And do you just push the cartrirge onto the inflator, or do the cartriges just lock in place? If you dont mind, I think I will make this sometime this summer(just in a WAY smaller caliber, like say 1/2 inch or 3/4 inch.)
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Unread postAuthor: Davidvaini » Sat Jun 21, 2008 8:59 pm

The inflator is currently not attached to the gun. I have been thinking about making some sort of modular setup so I can use it for multiple guns. So for now I am just going to keep it in my hand.
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Unread postAuthor: blind909 » Sat Jun 21, 2008 9:01 pm

Ok, but when you do get it attached, how will you fill the cartriges?, will it be by the 1911 pistol grip trigger?
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Unread postAuthor: Davidvaini » Sat Jun 21, 2008 9:04 pm

You press the inflator to the back of the cartridges. It will either be a front fore grip or a side grip of some kind. Just right now im also making a grenade launcher attachment for my FN2000 so I wanna keep it modular.
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Unread postAuthor: blind909 » Sat Jun 21, 2008 9:06 pm

Oh, ok.







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Unread postAuthor: Lentamentalisk » Sat Jun 21, 2008 9:09 pm

how do you keep the cart from being pushed out when you are filling it? can you give us a picture of the gun with a cart in it?
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Unread postAuthor: Davidvaini » Sat Jun 21, 2008 9:12 pm

the pop rivets at the end of the barrels to keep the barrels attacked to the center piece is just high enough to stop the shells. Besides the shells are a nice fit and there is some minor friction that keeps them from sliding forward or backwards... but to answer your question the pop rivets are what hold the shell from being pushed out. they do not block any projectile from being fired though.
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Unread postAuthor: elitesniper » Sat Jun 21, 2008 9:13 pm

niceeee, the wood adds a very nice touch :D, can you elaborate more on how the rotating part works? Ive already understand it but not the rotating part.
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