I have a MKIII Hunter Target model slabside... I was told mine was an Acusport special run. I have no idea on production numbers, but I believe it is somewhere around 5000.
Maybe Ruger just makes a lot of variations in 22 autos. Mine is the standard grip angle and is stainless. It did have hi-viz sights, but I ordered the sight blade and front sight and put it back old school.
I thought I collected S&Ws, but I now have 12 Ruger handguns.
I collected Rugers (or so I thought), but the old S&W and Colt revolvers kept following me home, too. I even have 1 Springfield Armory 1911.... danged if I know how that happened.