What does r01 Remington 550-1 mean and when was it made?

The R01 Remington 550-1 is a semi-automatic rifle manufactured by Remington Arms, known for its reliability and versatility in .22 caliber. It was produced from 1955 to 1970, making it a popular choice among small game hunters and target shooters during that era. The "R01" designation refers to the model number, while "550-1" indicates a specific configuration of the rifle. Its design features an internal magazine and a distinctive open bolt mechanism.