I used these on my jg ua-3. These fit better than the original mag that came with the gun. At first I didn't know if I would like an olive drab collored mag on a black gun but after I snapped it on, it looks great. If you take it out and there's still some bbs left in the mag, exactly 4 bbs will fall out. They work flawlessly so far. They do require some lubrication when you first get it. Even if you can load more, I wouldn't recomend loading more than 150 bbs; doing otherwise will jeopardize the longevity of yor mag. Great deal on airsoftgi.
Fits more snugly than original mag
See through, able to tell how much bbs are left
Kinda wished black was an optional color- one that you could still see through
Rating: [5 of 5 Stars!]