Needs to be examined by a gunsmith for safety purposes.
No serial number provided
this is the same serial number as mine,,model# 7424 frame size K model 10 5in barrel,,, would like to know the year of mine,, and why the open trigger guard,
The 2 letters AD ahead of the serial number indicate that your Marlin model 336RC(regular Carbine) was made in the year 1968.
Your Marlin model 336RC(Regular Carbine) with a letter K prefix to the serial number,indicates that it was made in the year 1953.
1877 if it's a Single Action Army. Nothing special about the serial number.
About 1913 for a Colt police positive special with that serial number.
Bottom of receiver in front of trigger
On the bottom of the rifle in front of the trigger assembly
1975
THAT NUMBER LOOKS LIKE A SERIAL NUMBER NOT A MODEL NUMBER. IF IT IS LOCATED UNDER THE STOCK JUST BEHIND THE TRIGGER GUARD IT IS A SERIAL OR PRODUCTION NUMBER NOT A MODEL NUMBER.
Your serial number indicates that your marlin rifle was made in the year 1992.
The serial number on my Maverick 88 is on the left side of the firearm, above the trigger and in front of the stock