This is a Browning known as the Buck Mark chambered in 22 LR, model 051530490.
Browning Buck Mark rimfire pistols lead the industry in quality" reliability" accuracy and variety. Every Buck Mark starts out as a solid piece of aircraft-grade 7075 aluminum alloy" and then is CNC machined to exacting tolerances. The crisp single-action trigger" hand reamed chamber" target crowned barrel and finely adjustable target sights mean the Buck Mark comes ready for fun straight from the box.
Features:
Straight Blowback Design
Enhanced Simplicity and Reliability
Large, Manual Thumb Safety
Recessed Crown