i'm far from an expert, but my kjw glock was having a hard time firing more 4 shots before dumping it's gas, turned out the gas valve in the mag wasn't returning to it's normal position fast enough after each shot so it was leaking gas. a little silicon oil in the valve helped(the little button like thing on the back of the mag.) also warming the mags up alot helped.
Last edited by ratnest; May 21st, 2009 at 12:59..
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