MP5 Selctor Plate
 

Hey there, I'm currently working on a CA MP5 for a friend. The selector switch doesn't function at all, the gun will fire on semi or full-auto randomly, and the safety doesn't work. I've managed to pinpoint the issue as being a small piece of plastic located between the selector switch and the selector plate which engages the selector plate. For those of you familiar with these guns, I'm sure you know what I'm talking about. This is a loose part that falls out when you remove the lower receiver. The issue I'm having now is figuring the best way to reattach the lower receiver while having this piece in the exact position I'd like. It seems that it needs to be resting in the lower receiver with gravity and you just have to guess, but this can't be the only way is it? I've tried resting the piece on the selector plate and sliding the lower over top of it, but there isn't enough clearance.

Thanks much in advance!

Evan.

Gravity.

Place the selector plate around "semi" position.
Place the selector cam in the hole and keep the receiver at angle at all times.
Insert the motor wires.
Insert the mechbox slowly in the receiver while keeping the angle. When it is seated properly but before screwing it all, work the fire selector to confirm it gets placed properly.

You should be done.

Also check if the thin sector of the selector plate at the top of the hole for the cam is not broken. It acts as a spring to keep the plate in the right position.

just .. please for the love of god.. dont "temp glue it" i had to repair a mp5 that was "fixed" using that method.. after i finally got it working, he asked "why couldnt i switch from full to any other firing modes?" i sighed, collected my money and hopped on the bus home.

morel of the story... DONT GLUE IT!!!!!

If you end up balancing the grip/lower, the mechbox and the little plastic cam in mid-air with a retarded frustrating look of concentration on your face....you're doing it right. :)

Do as KosMos directed...use needle nose pliers to get the wires into the grip if you have fat fingers that can't get in there without bumping things out of place.

A dab of grease (plastic friendly grease) can be used to "stick" things in place so it doesn't dislodge as easily.

hah hah, so true. and wow grease... fusk, why didnt i think of that?

Yup the grease trick works. That's what I do.

I used a pair of needle nose dentist forceps to hold it in place while I slid the lower body on. Lots of good methods mentioned here.