So, i was in germany for Christmas, just got back, i picked up 2 glocks but they were used for 15 euro each.
i did not have a chance to try them until i got home.
one is a kjw g23 and the other is a kjw g27.
it came with all stock parts.
g23 has guarder frame and slide, guarder blow back housing rest is all factory
g27 is guarder frame rest is all factory.
both of them are having the same issue!! when dry fired or BB fired the slide will not fully cycle, it gets tuck half way, randomly leaks air from the barrel after a shot.
i have tried: new bb housing. cleaning and lubing, checked piston for cracks or damage. checked sears, checked valve knocker, checked for barrel rub, magazines valves were removed and new orings replaced, lubed orings upon installation and seem to be working properly
i cannot for my life figure out what the problem is. they will not fully cycle if it helps; when they engage, they sound like little pop guns.
VIDEOS:
https://imgur.com/VDYl72m
https://imgur.com/ysHBp8w