Great Box Mag
This is a great box mag. Works on my King Arms, KWA, and G&G just fine. The KWA sits a bit tight, but I like that. Very easy to use. The battery doesn't have instructions. I just charge it two hours and am good. The mag is easy to fill up. With all 5000 rounds, the magazine is a bit heavy (makes sense) but doesn't have any wobble on the guns I have tried it with. The mag has 4 settings. Off, Full wind, Button feed, Sound feed. I really like the button feed and the sound feed. Even with my KR14 and G&G predator, the feed doesn't skip a shot on full auto. The button feed cord is plenty long for my non-firing hand to be on the front of the fore grip and push the button when I want it to feed. The Sound feed is very nice, the first few shots will miss if the spring is completely empty before engaging; my solution for this is to wind it up before entering the field. After that, I don't have a problem all day. There are two tubs in the mag to fill up. The top one feeds into the bottom one with a lever. Very simple mechanics to figure out. The charging cord input is on the bottom. I give this magazine a full 5 stars. I wasn't sure from the online description, but now that I own it; I highly recommend the product. It works better than expected.