Yea...I seen it !!
Welcome sheddoggie !!
RC = Regular Carbine
Strange that there is no letter prefix...
A letter C...
a small "c" and the receiver is case colored, it is a 1945
a capitol "C", and the receiver is case colored it is a 1946
A letter D...
A capital "D" means 1947.
The Model 336 followed in 1948.
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The Model 336 is a direct development of the Marlin Model 1893 rifle which was produced from 1893 to 1936.
Based on the patents of L.L. Hepburn, the Model 1893 incorporated a new locking bolt system and a two-piece firing pin.
In 1936, with only minor changes to the stock, forearm, and sights, the Model 1893 was re-designated the Model 1936 (soon renamed the Model 36).
All of these firearms featured a solid-top receiver made of forged steel and incorporated side ejection of fired cartridges.
Compared to the Winchester 1894, then the predominant lever-action hunting rifle, the Model 36 was somewhat heavier with a simpler internal mechanism and a full pistol grip-type butt stock in contrast to the Winchester 94's straight grip stock.