After putting a new spring into my gun I've noticed that when I switch my gun to semi-auto, unless I pull the trigger slow and hard, it will shoot full auto. The selector plate and switch seem to be fine so I'm kind of stumped :/

Any suggestions?

gumed up cutoff lever is all i can think of.

I had a similar problem, turns out i installed a little lever in backwards, its really small and has a tapered edge, along with a little hole in the center of the bootom, it fits on a pin

Its been a while since i took it apart though, just my 2 cents

Alright, so after I tried everything I could to avoid the box up, I gave in and did. After looking inside I noticed that a screw under the sector, that has a hurricane shaped nut near it... (best description I know!) was quite loose. After I tightened it up, just before the point where it was hard to turn since that probably would be bad, I threw the box together and tried it.

First I pulled the trigger, hard, still worked, pulled it lighter, still shot 1 shot on semi, but with the slightest pull it still shoots full-auto on semi, unfortunately.

And since I don't want to deal with opening and closing the box again I can live with a semi-hard semi pull.

Quote:Semi-auto issue Matrix M4 AEG

I highlighted what your problem is.