This is an inside magazine tube for the pre 1975 Marlin Model 60, 99, and 99C rifles. These haven't been produced in many years. If your serial number starts with "26" or higher (or does NOT have a serial number), the outside tube measures 20 9/32" from the receiver to the end, and the "J" notch is 1/4" long - this is the tube! We had these made with a metal follower instead of plastic.
If your serial number starts with 11 through 25 then you need part number 507522 found here.
Inner magazine tube worked perfectly.
First off just let me say Thanks, You have allowed me to fire this little 22 relic that hasn't been fired in over 40 years. Your description of the part (Pre 1975 inside magazine is what set your magazine apart from the rest of the suppliers. That gave me the confidence I was ordering the right part. A very well manufactured part it turned out to be. You are saved in my favorites and you will be my first choice for gun parts in the future. Thanks.
Marlin / Glenfield
Marlin / Glenfield
