O-Ring for Magazine Base for Tokyo Marui / WE Hi-Capa Series Airsoft GBB

"I really recommend these over the moondog industries ones simply because THEY STOP YOUR LEAKS!!

The moondog ones are slightly cheaper (6 for $5) But you end up breaking half of them trying to get them to work!
With these, I use a double o-ring set up on all my mags now. 2x the leak stopping power! You will never have any leaks. BUY THESE!