I ordered these for my Galaxy MP5k, and they work great. There is little to no wobble, the metal is good quality and they feed great. There's not really much else to say, they do what they're advertised to do.
-Actually hold about 70 rounds, I counted
-MAG midcaps are a better deal, but these look cooler than standard MP5 magazines in an MP5k IMO.
Rating: [5 of 5 Stars!]