KWA M4A1 GEARBOX

I have my KWA M4A1 completely assembled and ready to go except for one problem. I simple cannot fit the gearbox back into the body of the gun. I had this problem a year ago with my friends KWA M4 S-System. We just could NOT fit that thing back in there. There must be SOME way of getting it back in, the best way I can describe it is that....the gearbox is just not meant to be in that body, but it was in there to start, so that is just very confusing. Rhino put the gearbox back into the KWA M4 S System a while back, how did you manage to fit that thing in there? Thanks in advance!

You have to align the selector with the selector plate, put the selector half way between safe and semi, then lower the gb in nose first, get the trigger in, then get the rear of the gb seated.

Yeah just make sure everything is aligned properly and it should slide pretty easy.

I believe that you are right, but I can't find the proper alignment, Ive been working at it for an hour, marking hashmarks with a pencil on where it doesnt work....Ive made a full semi circle around the selector switch now, there isnt a position I havent tried to ease it in, muscle it in, or wiggle it in. Rhino, if you read this, what position did you have to set it to to get it in there?

Normally the best way to set it is on semi.