Open up G&G M4 Full metal version

[malik]

I am just trying to split the lower from upper receiver so I can replace the hop-up(BBs shooting to the side a lot after 50ft). I can get the front pin and rear pins(there are two on my G&G not counting the middle pin near the selector switch). Do I need to remove the middle pin too? Am I just not applying enough force to pull them apart?

Note: Wired to front, RIS rails instead of plastic hanguards.. Nothing that should be changing how the to receivers stick together...

[CADPAT]

this maybe helpful.
http://www.mechbox.com/m4m16/m733-disassembly.html

[darkaces07]

When i took apart my friends m16 it had to pull and jiggle the charging handle to get the receivers apart be sure to undo the front wire connector

[malik]

Videos are a no-go. Dial-up... Thanks anyway though.

[Wombat Six]

G&G receiver does not break down shotgun style like other receivers, you need to slide the upper receiver "forward" as it is wrapped around the cylinder assembly of the mechbox. Hope that helps.

[malik]

Okay, I thought I had seen that, do I remove ALL the pins or just the main 2 like in most M4s?

[Vidar]

I would assume that it's just the two receiver pins. If the gun is wired to the front, make sure that your wiring isn't getting caught up in anything.

You could also try opening up the dust cover to see if anything is catching inside the upper receiver.

Just try and coax it out, basically. If you encounter serious resistance, then there's probably something that needs to be moved.

[Wombat Six]

Okay, I thought I had seen that, do I remove ALL the pins or just the main 2 like in most M4s?

As Vidar said, the two receiver pins (like any normal M-4) should be sufficient. The two I've had to break down involved a very delicate process as the wiring to the front is very fragile (insulation is crap) and basically shoved through a tiny opening through the center of the barrel nut.

[malik]

So... remove two pins, pull upper receiver FORWARD, be very careful with the wires...

Would it be a bad idea if I just cut the wires off and soldered them back on later?

[malik]

Alright.. And, in the event I am overly stupid and pull the wires out, is this repairable?

[Blizzard]

In my opinion, wiring is one of the easiest parts of a gearbox to fix if it goes bad. You just have to have the know-how to do it right.

To avoid messing it up, just take it really slow. Patience never hurt anybody.

[malik]

Yeah.. for whatever reason my receivers will not budge. It's like the idiot before me threw some glue in there or something... I mean, they are locked together. Is that normal?? And yes, I removed the rear pin(G&G has 2 in the one hole) and the front pin... Is there ANY middle pin I am missing? I don't want to apply a ton of pressure then have the receivers rip away from eachother destroying the wiring.

[vatican.ninja]

I'm going to re-state what someone else suggested because it works for my friend's G&G M16. You have to remove the two pins and then work the charging handle while trying to slide the body apart. There's a metal block on the top of the gear box that, theoretically, stops the gearbox from accidentally coming apart if the charging handle isn't moved. It can be fairly finicky though. Also, in moving around the charging handle, it can be easy to stretch the spring, making it non-functional so that the spring has to be removed before the body can be put back together.

Hope this helps.

[G36 FTW]

I just so happened to need to get into my AGM m4, which opens in the same way as G&G m4s, so I decided to make a guide.

First off, the problem is with the nub on the top of the V2 gearbox (seen under the N in the last picture, so you just need to do this; after removing the receiver pins/magazine (IF your magazine is still in, that’s the problem- I've done that several times lol )

Pull out the charging handle.

Pull up the charging handle over the gearbox nub- while sliding the receiver off.

You WIN! (nub under the N was the problem, little bastard isn’t it?)

[malik]

Hey, that may be it. However, I can't even get the receiver forward as much as you do in the 1st image. I'll try it tonight or tomorrow...