I was issued a real deal, fully automatic, MP5 for the three years I spent doing entry team duty on a drug task force. It was a cool gun, but not nearly as useful as the Colt Commando SBR's that most of the other guys carried. I am not a big fan of 9mm to begin with, and as a cartridge for a long gun I find it entirely inadequate. The MP5 is loved because of the movies it has appeared in. I am convinced that if the MP5 were as readily available in select fire/SBR configuration as a Ruger 10/22, they wouldn't be able to sell them for more than a couple hundred dollars per copy. Is it a cool gun? Yes. Are there a lot of guns out there that are less expensive, more powerful, and more useful? Yep.