Star Firearms — Ultrastar-series pistols
Model 205 Ultrastar 9 mm & .40 cal. Pistols
Also using the same operating method as the M31, but with an ejector port locking block, the Ultrastar pistols are smaller and lighter guns for carry and concealment. A single-column pistol in either 9 mm Parabellum or .40 S&W cal., their primary feature of interest is a polymer frame. This is constructed with steel inserts and a ribbed magazine well for extra stiffness and strength. Fitted with a straight barrel instead of a cone, the Ultrastars are lightweight and well-suited for their intended role, with even the safety lever fit flush when on 'fire.'
Ultrastars are also single-column pistols, which is unusual for a newly-deisgned pistol these days, and helps make the gun slim and comfortable. They could have been designed even more slim, but instead there is significant thickness, with reinforcing webs, under each grip area. This gives the frame a very solid feel, something lacking in many other plastic framed pistols.
These also have a drop safety and no firing pin stop plate. I have never detail stripped one myself, but the firing pin seems to be retained by a set screw behind the rear sight base. The stripping pin is retained in the frame when pushed to the side to strip and is separate from the slide lock, as on the Megastar.
Model 105 Star 9 mm & .40 cal. Pistols
The Ultrastar guns are based on a mid-1990s prototype M-105 with an aluminum frame and plastic grips. This alloy version apparently never reached production.