Help with a jg m4
I've had a new jg m4 (originally a dragon). the internals are all stock. i know it needs a a whole new hop up, because one of the gears broke of, and it needs a new rubber, because the back part of the rubber where the bb goes in istorn off (honestly, i haven't been ruff at all)
I'm guessing the messed up accuracy and no velocity is caused by that.
My other problem is every few shots it double feeds. is the damaged hop up causing this, or is it something more serious?
also what hop up would be recommended to replace the stock one?
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