Hi,
Just had my R85 out in a skirmish and come across an odd problem.
Its second hand, has the piston mod and a madbull hop up rubber.
It`s occasionally refusing to fire.
In semi it would make a small sound (a very short burst) and thats it, over and over again as if the motor isnt moving enough.
Switching to auto and it would just "click".
Fixing it was usually switching between the two until it fires and it would usually work fine until I changed mode and the once, changed a magazine.
Any idea what could be causing this?