xx is 1951 but there is no month code y (blackpowderx) are the valid letters for month.
Remington Arms introduced this model in 1939 and discontinued production in 1963 with an approximate number of 381,267, units built. The codes AG would place the manufactured date to March of 1960.
The Remington Model 547 is in production.
The Remington model 510 Target Master was made from 1939-1962.
You will have to ask Remington.
Remington's website does not show it as current or out of production.
A Remington model 41A is worth between 55-175 dollars,a model 41P is worth between 55-200 dollars,and a model 41SB is running between 210-325 dollars.these Remington single shots were made from 1936-1939 with a total production of 306,880 guns.
The last year of production for the Remington model nylon model 66 was 1990.These rifles were made from 1959-1990 with a total production of 1,050,336.
It was in production from 1931 to 1949, when it was superseded by the Remington 870.
Click the link to see production from 1927 to 1937 of every model they made.
From 1941-1970
Yes
The C prefix dates your Remington model 700 to the year 1982.