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Airsoft barrel design help.

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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Airsoft barrel design help.

Unread postAuthor: big_boom » Mon Sep 24, 2012 11:47 pm

hi guys,
so i have some issues regarding the design of my airsoft barrel-
1- i was thinking of placing the 6mm barrel inside a 1/2" brass pipe which will then be fastened to the QEV via your standard brass fittings. was thinking of gluing washers inside either end of the brass pipe and inserting the 6mm barrel inside the washer holes to hold the barrel in place. is there an easier way to do this?
2- my loading system will prevent the bb from rolling back in the barrel, but how do stop it from rolling out the end?
thanks in advance :)
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Last edited by big_boom on Tue Sep 25, 2012 1:02 am, edited 1 time in total.

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Re: Airsoft barrel design help.

Unread postAuthor: jackssmirkingrevenge » Tue Sep 25, 2012 12:47 am

big_boom wrote:1- i was thinking of placing the 6mm barrel inside a 1/4" brass pipe which will then be fastened to the QEV via your standard brass fittings. was thinking of gluing washers inside either end of the brass pipe and inserting the 6mm barrel inside the washer holes to hold the barrel in place. is there an easier way to do this?


Does a 6mm barrel even fit in a 1/4" pipe? if 1/4" is the inner diameter then that gives you a wall thickness of 0.175mm...

Why not just epoxy the 6mm barrel to a male fitting?

2- my loading system will prevent the bb from rolling back in the barrel, but how do stop it from rolling out the end?


There are various types of "detent" you can use, one way to do it is to saw a small slit in the barrel, then slip an o-ring over it and epoxy in place. It can also get a bit more complicated:

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Unread postAuthor: big_boom » Tue Sep 25, 2012 1:02 am

that o-ring idea will work perfectly :)
woops, that was meant to be 1/2". sorry. and epoxying it directly to the fitting will make it hard to get straight.
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Unread postAuthor: jackssmirkingrevenge » Tue Sep 25, 2012 1:13 am

big_boom wrote:woops, that was meant to be 1/2".


Right. What you can do to centre it instead of bothering with washers is to simply wrap the ends of the 6mm barrel with tape until you bring it up to the pipe ID, I find narrow masking tape works well for these applications.

For this I just used masking tape wrapping, epoxy and brass tubing: http://www.spudfiles.com/forums/mini-0- ... 20101.html
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Unread postAuthor: big_boom » Tue Sep 25, 2012 1:17 am

ok, thanks for the help :D
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