Can I swap the Jing Gong M4A1 Gearbox set to a Systema gearbox set?

Question

I was just thinking if my Jing Gong M4A1's gearbox is going to break down in two years, so I think I may need to change the gearbox when that time comes.

Answer 1

JG guns are clones of Tokyo Marui guns and Systema gearboxes usually fit all Tokyo Maruis. If JG cloned the internals exactly, which I am sure they did, then a Systema Gearbox should fit a JG.