Introduced in 1961. Chambered for .22 Jet, a Remington cartridge. Barrel lengths 4", 6", and 8.375". Finish blued. Sights were adjustable. Furnished with cylinder inserts that would allow .22 rimfire cartridges to be fired. Frame had two firing pins. Approximately 15,000 produced before it was discontinued in 1974. Price includes guns with individual chambered inserts. Note: Add $150 for the auxiliary .22 LR cylinder. One engineering change.