A.E.G. SR-15 Dissassembly Help

[RedSpo0n]

Well, as most of you know, I'm not new to working on my own equipment but his one has me stumped.

Picked up the Asia Electric Gun SR-15, (that's Matrix/AEG/GB/JG from what I've gathered trying to find this myself), and found it needs a spring upgrade for my purposes. No big deal just do a quick takedown and install a new spring... Upper, stock, press-pin, mag release, Bolt-catch release, Grip and motor... Gearbox is still stuck.

Seems like it's captured with the Ambidexterous fire selecter, different from the other AR-varients I've worked on, but I cant see anyway to remove it to free up the gearbox.

Any input would be greatly appreciated!

[Riddick]

hey steve, did you try putting in the new barrel and see where the fps puts you?

BTW it's Asia Electric Gun aka AEG

[RedSpo0n]

With the tightbore it's shooting 315 /w .2

I know it's the Asia Electric Gun version - just saying from my research that the Matrix SR-15 is the same design (and rumor is that JG has a model coming that's the same too) to widen the potential information base.

The barrel was easy as always =p Sexy accurate with the tight bore (what brand is that btw?), PDI W-bucking, Metal one piece hop up, It's got Metal bushings and a metal spring guide - looks very solid from the outside, but since I intend to use it for anti-bolt-action and spotter duty it still needs a little more zip.

Course in the meantime I put the short suppressor on and a 9.6, 1600 battery and it just wants to be a run-and-gun machine. =p

[LiquidSnak]

are there tiny set screws on the bottom of the fire selector gears on each side?

[RedSpo0n]

I looked for that first thinking it was like the MP5/g36 design, but no, there are no exposed fasteners that I can find which is why I'm thinking theres a 'trick' to it that I don't know

[LiquidSnak]

I haven't opened one of those up, but they might be very very small. If I could take a look at it, I'd be able to tell you...

[RedSpo0n]

And new information arises!!

Looking at the pictures on A.E.G.s website, their SR-15 selectors have very obvious hex screws in the center, however mine has what look like little cover plates over said screws. I can see the seems so I'm guessing they're glued on to prevent 'tampering' or coming loose from use - guess I get out a torch and the mustard and see what comes of it.

EDIT FOR COMPLETE:
So, Yes, they installed little cosmetic discs over the Hex screws and glued them down. Quick hit with the mini-torch and a tap with a flathead and blamo, Hex screws to work with.

[RedSpo0n]

New round of WTF?!

Installed a Modify S120 spring... chronoing at ~300fps. Even with piss-poor compression it should be more like 350 alteast, right? To be fair, I didn't check it's compression when I had the gearbox apart, but it still seems to me the spring I received is somehow misslabeled.

Guess I'm opening it up again and checking compression... and probably swapping springs from my M4 I know sits just under 400 atm...

[LiquidSnak]

Turn your spring around.

[RedSpo0n]

It's installed compressed coils on the guide - I checked that first =p It's actually mispackaged. I swapped that spring into my other M4 and got a 300fps reading in that gun too. (and that other spring into the SR-15 and got a 385 as expected).

Quick finger-test from compression says the cylinder-to-nozzle seal is pretty good too. Overall I'm really impressed with this gearbox, save it's whimpy stock spring.

Thanks for trying to help though Liquid! I really do apperciate it.