High Standard's Sentinel is a low-cost tackle-box revolver that holds nine rounds of .22 LR. The unique ratchet mechanism utilizes nine holes drilled into the rear of the extractor, worked by a traditional pawl that extends from the frame. The holes give the pawl a positive interface, providing flawless cylinder rotation and reducing the machining necessary on the frame and cylinder. Each Sentinel was built with an anodized aluminum frame and a high-tensile carbon steel barrel and cylinder. The Sentinel employs single-stroke multiple ejection and a swing-out counterbored cylinder. Other features include a movable square-notched rear sight, a non-slip scored trigger, and a diamond-checkered grip. There is an integral thumb rest molded into the frame behind the cylinder housing on each side, making the gun feel quite natural in the hand. This handgun features a ramped front sight with a rear notch and black synthetic grips. Its grips, metal, and bore are all in good condition.