these magazines are complete and utter garbage. i bought two of them, one broke before i even got to play and the other caused me to get destroyed in combat while trying to unjam the sytupid thing. they are the worst feeding magazines i have ever used. they shoot about 5 BBs and decide their done and just jam up your hop up and barrel. the string winding, while a good idea, is not ready for use in real play, it snags constantly. upon taking it apart i found out that the screws holding the interals together have to be loose other wise the string does not retract. so wobbly, unstable internals are nesseccary for the stupid little string to work.
in all G&D are just a bunch of greedy idiots that came up with cool ideas, half ass the quality then sold them to unsuspecting players just looking for some thing exciting and different to add to their load outs.
if you care at all about preformance and not looking like an idiot on the field run as far away from these things as possible and just stick to normal good old fashion high caps with winding wheels