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P90 BB

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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P90 BB

Unread postAuthor: farcticox1 » Sat Nov 03, 2018 3:18 pm

This may take some time to complete so I am going to take pictures of the progress. P90 style BB gun, maybe full auto or burst fire, depends how it works, or maybe not at all. :shock:

BB 2.jpg
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Cut out the rough body shape from 3/4" plywood. Will be in two halves screwed together.

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farcticox1
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Re: P90 BB

Unread postAuthor: farcticox1 » Tue Nov 20, 2018 5:10 pm

Been working on a block of aluminium I found, it houses a cylinder which will block the BB's when fired, it will be a 4 shot burst if it works :shock: 1" stainless steel chamber finished as well.

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Re: P90 BB

Unread postAuthor: farcticox1 » Thu Nov 22, 2018 4:45 pm

Had to change it a bit as I realized there wasn't enough pressure in the barrel to operate the blocking cylinder, had to move it to the pilot supply which stays at full pressure. Tried a gravity fed mag but that won't work unless it has some pressure on top to keep the BB's down when firing, finally got the burst fire to work :D

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Looks like something I made a few years ago :shock:
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Re: P90 BB

Unread postAuthor: hectmarr » Fri Nov 23, 2018 3:25 pm

How many shots per second do you think you can achieve? It looks compact, and will be excellent with wood placed. I like it.
In my automatic weapons, I use pressure in the magazine where the ammunition is housed. A small pressure of less than 1 bar is enough to put the ammunition in the firing tube, even against gravity. It is necessary that the ammunition have a little adjustment in the charger tube.
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Actually I'm planning the improvised, and improvising what's planned!
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Re: P90 BB

Unread postAuthor: farcticox1 » Fri Nov 23, 2018 6:41 pm

If it feeds ok I will try the magazine horizontal :idea:

side mag.jpg
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