Marlin Model 75 & 99 M1 .22 Inner Magazine Tube for Pre 1975 Rifles Part 507122
Replaces Marlin part number 507122. Marlin Model 75 and 99 M1-. 22 Inner Magazine Tube - for Pre 1975 rifles There are two variables to getting the right tube for your Marlin/Glenfield model 75 and 99M1.