High Standard Sentinel R-103 .22 LR 9-Shot Revolver, 4" Barrel, Alloy Frame
This early-production High Standard Sentinel R-103 stands out for its lightweight aluminum-alloy frame, nine-shot capacity, and distinctive pull-forward ejector-rod cylinder release. Designed by Harry Sefried II and built in the 1960s, it blends a full-size profile with a handy 4-inch barrel and minimal-screw construction, making it a practical and collectible rimfire revolver.
Condition
Overall Condition: Fair condition, showing extensive signs of prior use and handling.
Bore Condition: Good – Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling – Intact, well-defined lands and grooves.
Specific Condition Notes: Scratches, finish blemishes, and small spots of light rust and pitting are visible on the metal surfaces. The rear sight is drifted slightly to the left but remains functional. The bore is clean and shiny.
What’s Included
- Tan leather belt holster (revolver fit)
- Matching tan leather ammunition pouch
The R-103 series introduced a radial-slot extractor that speeds empty-case removal, complementing the pull-forward ejector-rod release found only on Sentinel revolvers. This design eliminates the traditional thumb latch and contributes to the model’s streamlined profile.
An aluminum-alloy frame and anodized matte finish keep weight down while resisting corrosion, pairing with a carbon-steel barrel and cylinder for strength where it matters. Only one screw is used in the entire revolver; the remaining components are secured with cross-pins, a hallmark of Sentinel engineering.
The nine-shot cylinder maximizes .22 LR firepower without enlarging the grip or frame. A smooth double-action/single-action trigger, exposed hammer, and hammer-block safety give the shooter versatile control for rapid or deliberate fire.
Fixed sights consist of a serrated ramp front blade and an integral square-notch rear. The one-piece brown Tenite grip with eagle-logo medallion is correct for early R-103 production, adding period authenticity.