rebuilding ics m4 split gb

[wingzero]

i bought a very used and worn ics m4. weve rebuilt almost everything in the gearbox minus the trigger assembly and the lower gb shell. i put a inline fuse on the wiring as well.

the problem: even with a fully charged 9.6 it sounds like its almost dead and very very lower rof. and most of the time it just stops doing anything all together... quetion 1 is, could the trigger assembly be arching bad enough to short out the internals to do this to the gun?

problem 2: the ics airnozzle is a pos basically and i have a very nice oringed nozzle but it looks like when i use that one that it may be slightly too long and stops the mags from feeding... ive been told a new/different tappit plate may fix it, the question is what am i looking for to fix the problem... what brand/type of plate might fix it? its a very small difference in length on the nozzles

[keesbb1]

The problem sounds like it's the lower gearbox is not shimmed properly, that is why the rate of fire is so slow it's in a bind, the air nozzle could be too long. I had problems with the tavor I rebuilt having the same issue not feeding. I shaved down the new air nozzle( it was metal) johns ics m4 wouldn't feed because the tappit plate had a wore spot on it letting it slip off from the sector gear not letting the air nozzle go back far enough all off the time. one question is does your battery get hot when you are firing, if so that is usually a sign of improper shimming of the gears.

[vulrath]

What kind of spring are you pulling back? If you're trying to pull anything higher than an M120 spring, I would expect to see something like the symptoms you describe.

I would also second checking the shimming; it sounds to me like it's probably shimmed too tight, if it isn't just battery silliness. Even then I'd make sure it's properly shimmed by reshimming it from scratch.

[Lancer]

I doubt it is the trigger, as before, check the shimming. Beyond that, unless its a stupidly large spring, maybe try a new motor.