High Standard Sentinel R-101 .22 Rimfire DA/SA Revolver with 4 Inch Barrel and 9-Shot Cylinder
This High Standard Sentinel R-101 is a U.S.-made .22 rimfire revolver from the 1950s, built around a nine-shot swing-out cylinder and a DA/SA action with an exposed spur hammer. It features iron sights with a front ramp/blade and a rear notch in the top strap, along with a distinctive two-tone look with a matte gray frame and a darker barrel and cylinder. Markings include the R-101 model marking on the right side of the frame and Hamden, Connecticut barrel address markings.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Specific Condition Notes: This firearm is in solid shape. There are scratches and blemishes present. The bore is clean and shiny.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
What’s Included
- Tooled leather holster with retention strap/snap
The Sentinel R-101 is a double-action/single-action revolver with a nine-round capacity in .22 rimfire, giving it a high-capacity cylinder for its class. The swing-out cylinder design and visible knurled ejector-rod head under the barrel are notable external features.
Factory and location markings are clearly identified on the barrel, including "HI-STANDARD" over ".22 CAL" on the left side and "HIGH STANDARD MFG. CORP." over "HAMDEN, CONN. U.S.A." on the right side. The model marking "R-101" is marked on the right side of the frame.
Visually, this example presents with a two-tone appearance: a matte gray frame paired with a darker-finished barrel and cylinder. The brown checkered grip has a centered diamond pattern with a single screw at the butt, and the frame medallion shows an eagle with "SENTINEL."
Sighting is straightforward and period-correct, using iron sights with a front ramp/blade and a rear notch cut into the top strap. The barrel length is stated at 4 inches, balancing compact handling with usable sight radius for a rimfire revolver.