the Excam RX22 (often marked as Erma-Excam RX22) is a compact, semi-automatic pistol chambered in .22 Long Rifle (LR). It was manufactured in West Germany by Erma-Werke and imported to the United States by Excam during the mid-1980s. Key Specifications Manufacturer: Erma-Werke (Germany); imported/marketed by Excam. Design: A visual clone of the Walther PPK. Caliber: .22 LR. Capacity: 8-round detachable single-stack magazine (often listed as 8+1). Action: Double-action/Single-action (DA/SA) with a blowback-operated system. Barrel Length: 3.25 inches. Weight: Approximately 17-20 oz unloaded. Safety: Slide-mounted thumb safety that also functions as a decocker.