This American made quality reproduced early variation inner magazine tube assembly is for the Marlin model 99M1 semi-auto rimfire rifle manufactured before June of 1975 and is in as new condition. (file photos)

Note: Please check the serial number listing at the top of the page to determine the year of manufacture of your 99M1 rifle. If your rifle was manufactured specifically in 1975, it would have the first two digits with a "25", thus we have found the 99M1 manufactured in 1975 and using this early variation magazine tube assembly with serial numbers as high as 25313219.