Hmm, interesting. Have you ever left your magazines with BB's in them overnight or something like that? That would sufficiently weaken the follower spring to the point of a failure to feed BBs from the magazine. Think WE single stack follower springs *shudders*.
I had a failure to feed issue when I was running a stock KJW KP06 with a Dyna piston installed. The position of the piston head screw inhibited the complete cycling to the rear, and would not allow the loading nozzle to cycle very much at all. Consequently, no BB's would be fed into the chamber - at least, not consistently. This, however, is a result of a different floating valve blocker/loading nozzle design that the "CO2 compatible" KJW Hi-Capa's have (from pictures I've seen, the KJW KP... uh... normal Hi-Capa has the same design). Now someone remind me, where the hell was I going with this?
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