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Marlin Magazine Tubes

By Dean Batchelder

It seems that one of the most common magazine tube problems that come across our desks in the Tech Department are those pesky Marlin/Glenfield .22 cal. inner magazine tubes. These magazines seem to bend, break, or just plain disappear overnight and because Marlin made them in different styles and lengths, sometimes it’s a little difficult to determine which one to get as a replacement.

That will be the goal of this article, to help you figure out if Marlin or one of the aftermarket tubes we carry will be the magazine you need for your rifle. The illustration below shows three things to check for to determine which magazine tube you’ll need. To get measurement “A”, measure the length of the magazine tube from the face of the receiver to the end of the magazine tube. Measurement “B” is found by measuring from the front of the Magazine tube to the bottom of the L-shaped locking slot. "C" you need to see if you have one or two locking slots, which would determine the number of pins on the magazine tube.  Other notes may be added that may help you determine what tube you need.

In the table below you'll find the Marlin magazines available listed along with the measurements of “A” and “B”, and the number of locking pins on each magazine will be indicated under “C”, along with the Brownells stock number for that particular magazine.

 

Marlin Model

“A”

“B”

“C”

OA length of inner tube not including follower

Original Marlin Part Number

Brownells Stock Number

60, 60SP, 60SC,
60W, 75C, 990L

17 13/32”

½”

2

17 15/16”

507922
Blued cap

550-507-922

60SB, 60SS, 60SSK

17 13/32”

½”

2

17 15/16”

507022
Silver cap

550-507-022

60, 99C, 990

20 9/32”

11/32”

1

20 13/16”

507522

100-017-020

60, 99, 99C
Pre-1975

20 9/32”

¼”

1

20 27/32”

607222

100-017-021

75, 99M1
Post-1975

9 15/16”

¼”

1

10 ½”

507122

100-017-018

75, 99M1
Pre-1975

9 15/16”

11/32”

1

10 ½”

507422

100-017-019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

These are the only magazine tubes we currently carry for the Marlin .22LR rifles and I hope this will help you when you are ready to replace your Marlin magazine tube.  If you need a length or measurement other than the ones listed,  we don’t have anything available at this time.