1958-1961....
100-400
100-400
Marlin
1950
It is a Marlin 336 carbine as made for Sears.
1981
The R prefix was assigned to the years,1957-1958 by marlin.Therefore your Marlin model 336 was made during this time span.
Your rifle was made by Marlin for Sears, but used a different serial number sequence, making it difficult to date it precisely. The JC Higgins name was only used on the model 45 from 1958 to 1961. By the way, that is a really good deer rifle.
1955.
71
The AA serial number indicates a 1965 year of manufacture.
http://oldguns.net/sn_php/marlinlookup.php P...........1957