Hello, I've got problem, blow back is very very weak i changed and tested rocket valve to a+, valve konocker to aip and 2 other stock knockers, aip hammer set, airsoft surgeron loading nozzle, shooter design hammer 150:/: spring, ratech hop up, aip aluminum hop up housing, pdi barrel, guarder slide, guarder frame, and blow back weakness on all 3 mags , everything worked fine on green gas till yesterday, everything sitting probably, there is no friction, anybody know what's wrong?. Sorry for my bad English.
Here is video
20130929_123451.mp4 - YouTube