While researching parts for the build, I noticed that TK offers upgrades for several makes and models, including the new Ruger MK IV 22/45 Lite .22 pistol.

Ruger 22/45 Mk IV Specifications Manufacturer: Sturm, Ruger & Co. Distributor: GalleryofGuns.com Action Type: blowback-operated, semi-automatic, rimfire pistol Chambering: .22 LR ...

The Mk IV feeds, extracts, and ejects rounds the same way as do previous models. The magazines have a single-stack design that places the rounds in line with the feeding ramp that guides them into the ...