Make: High Standard

Model: Sentinel MK I

Serial Number: S34187

Year of Manufacture: 1974-1977 / ATF Classification: Modern

Caliber/Gauge: .22 Long Rifle

Action Type: Single/double action, 9-shot

Barrel Length: 4"

Sights/Optics: The front sight is a blade with a serrated face fixed atop the barrel. The rear sight is an adjustable square-notch screwed into the top strap.

Grip/Stock Configuration & Condition: The grips are two piece smooth wood. The grips show scattered scuffs and scratches. There are no chips or cracks. Overall, the grips rate in Good condition.

Type of Finish: Blued

Finish Originality: Original

Bore Condition: The bore is mostly bright and the rifling is sharp. There is only a small fleck of erosion at the muzzle. In this writer's opinion, the bore rates 9/10.

Overall Condition: This firearm retains about 75% of its original metal finish. The finish shows edge wear, spots of oxidation, a defined turn line, and minor scratches. The markings are clear and complete. Overall, this firearm rates in Good condition.

Mechanics: The action functions correctly. We did not fire this firearm. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance standards.

Box, Paperwork & Accessories: None

Our Assessment: This High Standard Sentinel MK I was manufactured between 1974 and 1977 and is chambered in .22 Long Rifle. Produced by High Standard Manufacturing Company, the Sentinel series was introduced as an affordable yet dependable double-action revolver for recreational shooting, training, and small game hunting. Featuring a lightweight alloy frame paired with a steel barrel and cylinder, the Sentinel offered shooters an economical rimfire revolver without sacrificing durability or reliability. The MK I variants remain popular with collectors and shooters for their practical design and classic styling.

Chambered in .22 Long Rifle with a 4 inch barrel and a 9-shot cylinder, this double-action/single-action revolver is well suited for target shooting, plinking, and trail use. The generous cylinder capacity and manageable recoil make it an enjoyable and practical rimfire revolver for shooters of all experience levels. In this writer's opinion, the bore rates 9 out of 10, indicating excellent rifling with light evidence of use. The action functions correctly.

The grips rate in Good condition with handling wear consistent with regular use. This firearm retains approximately 75% of its original metal finish, showing honest thinning and edge wear while maintaining a respectable overall appearance. Overall, this firearm rates in Good condition and represents a solid example of the High Standard Sentinel MK I, a dependable American-made rimfire revolver that continues to offer excellent utility and collector appeal. Please see our photos for a better understanding of condition and good luck with your bids!