The mag itself is extremely high quality and is really durable (i have eight of them myself). one of the only downsides to them is that they are hard to get out of some mag pouches because they are really smll and look stupid on a full-sized MK5. they feed amazingly though. i have had mine for almost a year and have NEVER had any of them even once skip a BB. these are surprisingly heavy especially for how small they are. i loaded one up and compared it to a full high-cap (also full) and these were heavier.
feed very well
heavy (maybe a downside, but i like it)
Rating: [4 of 5 Stars!]