Those three in the middle are those so called "South African" mags. They were built for the Colt 9mm. But unlike the facotry, they are double stack, single feed. Those work great in my 9mm ASA. The only problems that I saw/have, depends on the mags. Some, as stated are tight. Others are really loose. Tight ones can be tweeked in a vice while the loose ones can be made tighter by putting aluminum or stainless steel heating tape (NOT duct tape). Other then that, they are great mags. I have a few of them.
Granted, I also have the Sten blocks from my. So my Colt mags are in storage, so to speak.
If you are looking for some like that, the trick is to bring your adapter block w/ you. Ask the seller (if gunshow) if you can fit it in the block. Best way, as some are loose... I saved my "loose" ones. They're my range mags... the rest, feed so good that I'd bet my life on them.