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NBB Airsoft Diagram?

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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NBB Airsoft Diagram?

Unread postAuthor: littlebro05 » Sat Feb 21, 2009 10:12 pm

Hi guys,

Its been a while since I've started a topic on this forums because of the workload i got on my final year of school... But I'll cut straight to the point. Does anyone have a diagram of a NON-blowback airsoft pistol and how it would work. I've seen a GAS-blowback before on a diagram. I've been searching google up and down but can't find any results...

So could someone fill me in on this, I was thinking of building one if possible lol.
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It's Nerf or Nothing.

Don't start crying when I play this as my hobby, Paintball, Airsoft and Nerf are equally good hobbies, except you can play Nerf in public. Good day! Hmph!
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Unread postAuthor: jackssmirkingrevenge » Sun Feb 22, 2009 12:23 am

Can't find a proper diagram but here's a helpful indication on how they wrok ;)

How does a NBB work?

The Non Blow-Back has a relatively simple layout. Without going in to a diagrammatic detail, this is the chain of events that occurs each time the NBB is shot.
1. The shooter pulls the trigger
The trigger is linked to the hammer and the reloading mechanism.
In a revolver, this means that as you pull the trigger, your pulling energy is going toward pulling the hammer back and rotating the cylinder containing all of the BBs. Most revolvers allow you to manually pull back the external hammer before firing though, giving the shooter a much easier trigger-pull.
In a semi-automatic pistol layout, the trigger-pull energy goes toward pulling back the hammer and the air nozzle pushing a BB from the magazine in to the breech. There is sometimes a manual option to 'pre-load' these before shooting, but this is not available on all models.
2. The trigger is almost completely pulled back
At this stage, the BB is in line with the barrel, the gas seals have been closed to prevent leakage and the hammer is about to be released...
3. The hammer is released
As the trigger is finally pulled all the way back, the hammer is released. It flies forward and strikes the firing valve inside. This releases a jet of gas out of the storage cylinder and directly in to the breech, behind the BB.
The BB is launched out of the barrel, while the firing valve's return spring forces the hammer to lift off, stopping the flow of gas.
4. The trigger is released
As the trigger is released, the mechanism relaxes. The pressure holding the gas seals firmly in place is released and the air nozzle (if a semi-automatic pistol type) falls back to allow another BB to fall in front of it.
Once the trigger has been fully released, the pistol is ready for another shot.
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Unread postAuthor: littlebro05 » Sun Feb 22, 2009 12:29 am

LOL did you get that from arniesairsoft.co.uk?

Hmm I'm not very good without visuals though... I'm that kind of person... it helps me understand the mechanism but I want to know what the mech is like.
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It's Nerf or Nothing.

Don't start crying when I play this as my hobby, Paintball, Airsoft and Nerf are equally good hobbies, except you can play Nerf in public. Good day! Hmph!
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Unread postAuthor: jackssmirkingrevenge » Sun Feb 22, 2009 12:36 am

Well, you know how a hammer valve works from seeing countless GBB diagrams, leave that and replace the blowback with some sort of physical link between the trigger and the reloading nozzle.
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