I have 5 WE Tech brand M4/M16 style mags that I'm ready to part with. I sold my WE 416 and now have some mags left over. (4) Green Gas, (1) Co2. They will also work on the WE 416, which is what I ran them in. They are used and have been re-sealed using JB Weld at the seams. I have tried installing new o-rings twice on these mags but they always seemed to end up leaking again. So I grinded the seams and perminently sealed them with JB Weld. So far they have held up all summer except 1. I'm to lazy to take it apart and grind off the old JB Weld and re-seal it. I will mark it with Blue tape to let you know which is the leaky mag. I forgot to install the bolt catch mechanism on 2 of the mags I have the parts. The parts will be sent with the mags. You just have to install them back in the mags. These are listed on Ebay for $80 for all 5.
Asking $80 shipped
4 - Green gas mags (1 leaky and 3 sealed mag)
1 - Co2 Mag (Co2 mag NEVER LEAKED)