I own both the KWA M4 and the M16, so I have several of these mags. I'm not quite sure they actually hold 360, but even if they hold 300, that's still a lot. I've had one of them for six months, and I've had no problems.
the finish on them looks like oil on top of water. shiny and nice...
$26 is a good price for something that you can depend on.
just buy it.
Rating: [5 of 5 Stars!]