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how do airsoft grenade launcher's work?

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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how do airsoft grenade launcher's work?

Unread postAuthor: JDP12 » Fri Dec 05, 2008 11:16 pm

Hey all, I was researching Classic Army's M203 grenade launcher, and I guess I couldn't really figure out how they fire.

How do they propel BB's and nerfs out of the barrel?

Are the cartridges preloaded w/ green gas or something?

I'd like some illumination into how exactly they work- if htere's a small chamber in the cartridge or what?

Thanks a bunch
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Unread postAuthor: Sticky_Tape » Fri Dec 05, 2008 11:19 pm

I always wanted to know that myself it would be cool if there is a piston valve in those.
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: JDP12 » Fri Dec 05, 2008 11:20 pm

Yea cuz I want to build a grenade launcher, and a big problem I've had is keeping it a small package, and I'm just curious how they do it.

I'm waiting for JSR or David on this one :wink:
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Unread postAuthor: Kash munni » Fri Dec 05, 2008 11:37 pm

I think it's a very small spring-assisted piston. The firing "cap" in the back is just a push-button pilot valve. So it's basically a coaxial with several small barrels.
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Unread postAuthor: jackssmirkingrevenge » Fri Dec 05, 2008 11:52 pm

ilovetoblowthingsup wrote:I'm waiting for JSR or David on this one :wink:


Fine then :roll: :D

Image

As Kash munni indicated, it's a "coaxial" of sorts with a central chamber surrounded by several barrels. The piston is held in place not by air pressure however, but by a ball detent (in the same way that quick connects lock in place) that is unlocked when the "firing pin" is pressed.
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Unread postAuthor: JDP12 » Fri Dec 05, 2008 11:55 pm

so... i guess I'm confused though- where is the reservoir and such? where does the air go?

sorry for being stupid... its late... haven't had much sleep
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Unread postAuthor: jackssmirkingrevenge » Sat Dec 06, 2008 12:20 am

This should explain it better (and really I just wanted to use the word "ball lock" in polite conversation :D )
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Unread postAuthor: Davidvaini » Sat Dec 06, 2008 1:25 am

jack pretty much hit it on the nail with those diagrams.

They are typically quite expensive.. $50 per shell and $100 for the launcher.. but I found this...

http://rsov.com/index.php?target=produc ... ct_id=3092
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Unread postAuthor: jackssmirkingrevenge » Sat Dec 06, 2008 4:26 am

Davidvaini wrote:They are typically quite expensive.. $50 per shell


Hardly surprising, considering each shell is effectively a self contained single shot airsoft gun that will have the same performance independent of whether it's fired from within a launcher or in your hand.
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Unread postAuthor: Davidvaini » Sat Dec 06, 2008 1:49 pm

yes, not really surprising but still expensive none-the-less to be able to buy a few shells and a launcher. I know you don't have to buy a launcher and you could make your own.. all you need is something to push the pin in the back.
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