Well here it is, my latest little creation. From what I've posted in previous threads, there really isn't much to add here. I felt that I had to make a new thread for his gun because the crappy looking throw-together of yesterday just doesn't come close to comparing. I still have to add the mag but that's for another day.
By far one of my nicest for a while.
Thanks everyone.
Specs: Barrel: 50cm x 10mm Aluminum tube. (ID 7.5mm)
Chamber: 20cm x 1/2'' Galvanized pipe.
Valve: 1/2'' Bellpro Quick Exhaust valve.
Pilot : 1/4" Pop-off Valve trigger by a custom blowgun.
Ammo: .....Whatever fits

Update!

I just added the new breech system. It's mostly air tight and works a charm. I'm going to add a nice mag and have true semi auto or just keep the breech open and have a fully auto feed.
Pics of it at the bottom.
http://www.youtube.com/watch?v=g_KiiExf ... annel_page Semi Auto feed into a pizza box.