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by upit14
Sun Oct 15, 2006 6:22 pm
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New semi auto chamber design:maybe full auto later

Hi, Ive had this design, in my head for at least a year now, and Ive finally found the parts I need for it. I would be very grateful for any comments on how I can improve it. The Expansion chamber will be made of 5 mm thick PVC that has two seals on the outer rim of the PVC piston. Almost all the in...