If i put shims before hop up and shims push hop and cylinder backward it start shooting... for me it sounds like sector gear cant catch piston teeth. but why after shimmed hop up it start shoot? and if i put cylinder with my hands on lower reciever averithing work perfect... btw systema is Challenge kit M90, in video with M130 cylinder, I replace upper reciever - Rainer arms FCC, outer barrel FCC multibarrel, Hop up unit FCC with orga hop ring, Orga 6,1 inner barrel, FCC 3.0 motor and FCC sector gear. This problem on video i have also with basic/original parts. This is my problem from the beginning... i build up systema challenge kit and from the first moment i have this problem (sorry for english)
Guys i cahnge upper and lower body, outer and inner barrel, hop up, motor, sector gear, .. my PTW is now almost full custom except gear box and electric parts... and nothing change... i check gears inside gearbox and everithink is OK. i replace sector gear for FCC. and nothing. PTW cant shoot without shims under hop up, sector gear cant stop on right side and if i put shims under hop then after shoot BB start turn to right... i am depressed, i have 2 years my systema and form beginning it cant shoot corectly. i spend lot of money to change parts and nothing change... i start think about systema it is worst gun ever.
Great, is the upper frame.
If i put shims before hop up and shims push hop and cylinder backward it start shooting... for me it sounds like sector gear cant catch piston teeth. but why after shimmed hop up it start shoot? and if i put cylinder with my hands on lower reciever averithing work perfect... btw systema is Challenge kit M90, in video with M130 cylinder, I replace upper reciever - Rainer arms FCC, outer barrel FCC multibarrel, Hop up unit FCC with orga hop ring, Orga 6,1 inner barrel, FCC 3.0 motor and FCC sector gear. This problem on video i have also with basic/original parts. This is my problem from the beginning... i build up systema challenge kit and from the first moment i have this problem (sorry for english)
cracked piston rail
I think buffer tube and cylinder 's problem.
It has to be tight
Need some lub ? Or you have a pression problem... Don't worry this piston are very easy to repar.
and please dont tell me i have to shim buffer tube because i try it and it was worst
the problem was a broken piston at the end of it under teeth, little hidden crack.
6 years later...ouuu god
Guys i cahnge upper and lower body, outer and inner barrel, hop up, motor, sector gear, .. my PTW is now almost full custom except gear box and electric parts... and nothing change... i check gears inside gearbox and everithink is OK. i replace sector gear for FCC. and nothing. PTW cant shoot without shims under hop up, sector gear cant stop on right side and if i put shims under hop then after shoot BB start turn to right... i am depressed, i have 2 years my systema and form beginning it cant shoot corectly. i spend lot of money to change parts and nothing change... i start think about systema it is worst gun ever.