The product in question is the Lonex Flash Mag for M4/M16 type guns. It is available on Evike for $25 at present. As far as I can tell, Evike is the cheapest domestic retailer of the flash mags for the time being. First, a couple of specs.
These are high cap magazines; they hold 360 rounds. That being said, they are about an inch longer than your standard 350-360 round high cap like the KWA high cap. That is because of this crazy new winding mechanism in the bottom. They are all metal and look and feel great in my SR10. They are a VERY tight fit in the magwell, so I wouldn't count on swapping these out quickly in the heat of battle. I got two and one of them was easier to get in and out than the other, but still required some wiggling. I considering filing them down like I did with my Magpul PTS high cap, but since they do eventually fit and continued insertion and removal of the magazine makes it a bit easier as the metal gives way, I decided it would be unnecessary. The nice thing about having such a tight fit is that there is positively no wobble in the mag like so many other mags have. This is particularly nice for me, as I grip the gun at the magwell with my second hand.
Now, for performance. The winding is super easy. There is a little metal trap door that swings open instead of a regular base plate. Inside there is a little plastic nub that you grab and pull out. This winding string is a metal cable, so I would imagine it will last a while. You wind the whole mag by doing this about five or six times. Swing the trap door closed - it stays securely shut - and you are good to go. These mags are primo. I have not had a single misfeed and they keep up with the KWA's high ROF flawlessly. I am only using a 9.6v battery at the moment, but I am expecting to receive my first lipo in the mail in the next few days, so I can report on any feeding issues at even higher ROF once I get that.
There is something about unloading 360 rounds without stopping that is pretty exciting. Plus, if you're on the receiving end, it is god damn terrifying (I lent one of the mags to my friend on the other team and he used it in a Sig 556 and kept my whole team pinned down for a good two minutes while his teammates flanked and destroyed us). At $25 a pop, these mags are well worth it in my opinion. You get all the no-winding goodness of a mid cap and the violence of action that comes with having a crap ton of ammunition. If you have $25, please just buy one.
Anyway, I hope I didn't sound like too much of a salesman for the manufacturer, but I swear these things are going to be the next big thing. It sure beats those high caps where you need an allen wrench or whatever and need to spend forever winding. Consider these things officially user verified as an excellent addition to any KWA owner's arsenal.
Edited by kostvoll, 10 January 2011 - 12:58 PM.