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6mm semi - added trigger & mag!

Built a BB Machine Gun? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: jackssmirkingrevenge » Fri Jun 11, 2010 2:25 am

Not sure if I understand the question, when it comes to pop-offs though I believe I've done my research ;)
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Unread postAuthor: POLAND_SPUD » Fri Jun 11, 2010 7:34 am

in other words... whatever you want to build jsr has probably already tested it (and the prototype exploded) :D
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Unread postAuthor: gluegunner » Fri Jun 11, 2010 2:28 pm

in your movie the magazine is above the barrel, could you use this system to feed ammo into the gun like in a m-16 or AR-15 setup?
also, how did you make the piston? I tried to cast a piston sorta like that one once out of hot glue, it stuck so badly that I couldn't get it out with a hammer.
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Unread postAuthor: Gun Freak » Fri Jun 11, 2010 2:31 pm

Did you lube the tube before you poured the glue? That helps a bunch with removal. To make the mag feed from the bottom he could simply add a spring... doesn't take a rocket scientist to figure that out dude.
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Unread postAuthor: gluegunner » Fri Jun 11, 2010 2:56 pm

actually I was more wondering if he had done it.
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Unread postAuthor: jackssmirkingrevenge » Sat Jun 12, 2010 1:09 am

I gave it a go here but was let down by a faulty seal.

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Unread postAuthor: farmerboy32 » Wed Jun 16, 2010 3:50 pm

if you can upgrade the materials to tuffer things you could use a stronger spring for a faster return. then pulse the air to it for full auto. :)
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Unread postAuthor: jackssmirkingrevenge » Wed Jun 16, 2010 11:25 pm

farmerboy32 wrote:then pulse the air to it for full auto. :)


Managing to do this successfully was my holy grail for a number of years, in the end the solution was relatively simple without fancy electronics or timer circuits ;)

[youtube]http://youtube.com/watch?v=w8e9Z5t1NDs[/youtube]
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Unread postAuthor: POLAND_SPUD » Thu Jun 17, 2010 6:07 am

without fancy electronics or timer circuits
yeah but the valve opens as fast as it cycles.. so in other words it is quite slow when compared witha typical piston valve
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Unread postAuthor: jackssmirkingrevenge » Thu Jun 17, 2010 11:03 am

POLAND_SPUD wrote:yeah but the valve opens as fast as it cycles.. so in other words it is quite slow when compared witha typical piston valve


I disagree, the piston always opens at the same rate - the difference in cycling rate is now long it takes the piston to re-close, obviously with higher flow it will be open for longer and you'll potentially get more power.
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Unread postAuthor: sagthegreat » Mon Mar 05, 2012 7:33 pm

Sorry for rebringing a old thread, but what materials did you use for the bolt
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Unread postAuthor: jackssmirkingrevenge » Tue Mar 06, 2012 2:10 am

As explained by PM, this is a simpler way of going about it: http://www.spudfiles.com/forums/full-au ... 10217.html

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