Bolt MP5 Fixed - Miss-feeding and not consistent

Repair on an airsoft Bolt MP5 recoil AEG - This gun was next to useless out of the box. Wouldn't fire consistently, no range, wouldn't hop heavy BBs. Somehow I got it shooting perfectly. This is how I did it. Hope this helps if you are experiencing the same problems.

Background Music:
Song: Ephixa & Jim Yosef - Everlasting [NCS Release]
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Free Download/Stream: http://ncs.io/everlasting
Watch: http://youtu.be/MT814DNhy_U