The fine folks at DSA had this rather mysterious MP5 in their reference collection, and we decided to take it out to the range to see if it would run. It's an MP-5, but chambered for .45ACP using altered M3 Grease Gun magazines. The original manufacturer is unclear; it's marked as being imported form Turkey, but does not appear to have been something that MKE made. So is it Pakistani? Or just someone's one-off project? I really don't know.

As for functioning, we found that only one of the magazines would work, and that only when downloaded to less than 10 rounds. It definitely has more recoil than a standard 9mm MP5, but is still pretty controllable...