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*EDIT*
Today I took Oblivious' concept of an auto reset pin pull and jacked it onto my UMP. It now shoots 15 feet with one #64 band and 35 feet with 2 #64 bands.I had to change the stock a bit but it still is realistic.

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THANKS GUYS
lot!
Good. I got the idea for the mech from looking at one of my airsoft guns.
5*
Thanks TD