[What gearbox do I have?]

Looks very similar to an AEP gearbox.

Or that used in an Uzi...

 

Personally, I think it is a custom made gearbox for the gun.

Hmm, shame since I don't want to throw it away seeing as it has its box and ain't in bad con, but then it'd be worthwhile getting a new one I guess. Any recommendations, preferably same design and auto?

[What gearbox do I have?]

Ok, so I bought 2 rifles second hand of someone local for a good price, but one was dissambeled. Anyway, I know how the dissambeled one goes back together and reassembled it, but I left the gearbox out since I knew it was faulty. After diagnosis I realized a gear was worn down too much and so I tried to find a replacement or ways of fixing it, in the end I gave up and tried to find the gearbox unit to see if it was worth replacing or buying a new gun.

 

The gun in question is a JG-139, and while I believe it to be made by Jing Gong, I can't find much, if any, reference to it. I found the gearbox here, but for $35 dollars I can't say it's worth it, especially since it needs importing. But now I'm at a loss, I can't figure out who makes this gear box, what model it is or where to buy one.

 

If anyone can help this newb, I'd really appreciate it, since I have to call it quits after search for a good few hours without any clue.

 

I have these photos if they help.

 

Thanks,

Naoki