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making the blow-forward breech 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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Unread postAuthor: JDP12 » Thu Apr 03, 2008 1:51 pm

i'll post a new topic for it. the benefit of this would be no spring would have to be used to recock it, thus allowing a faster recock time than a spring would be able to do. Even if you got a super strong spring, your air flow would have to fight that spring just to push the bolt forward. WIth this design, there is no fighting, its unopposed pushing for firing and recocking. and yea pressure drops might be a problem.... but not necessarily because as the pressure to recock goes down, the pressure to fire will also go down. TO combat this, I'm going to use some super thin o-rings so there is not as much resistance. I might lose a little air, but when i run this at the 300 or up PSI i plan on for my marble gun, it doesn't really matter now does it.

I'll have to test it.

Will be a new thread about this shortly. I will put quotes in it of our discussion of it as well.
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Unread postAuthor: Antonio » Thu Jun 12, 2008 7:45 am

hey jack, is this concept working or what? I used me stacked tube and made it auto by blocking up the barrel port"". The thing is that the air that comes out of the trigger hole at the bottom of the copper tubing doesnt have enough power to shoot a bb at a good rate. I know I should read through the forum and all, but it has gotten so big now.
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Unread postAuthor: jackssmirkingrevenge » Thu Jun 12, 2008 9:11 am

I never found the patience to tune this to working order, at the time I made the prototype I was going through some major personal issues and the last thing I needed was fiddling with reciprocating pistons, so the design was put on hold.
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