This is an inside magazine tube for the Marlin model 99M1 & 75 rifles. It replaces Marlin part number 507422. It is 10 1/2" from the tip of the knurling to the end of the tube and 11 13/16" overall. It fits the models made after 1975. We had these made with a metal follower instead of plastic. It is a reproduction made exactly like the original.
IF YOUR OUTSIDE MAGAZINE TUBE MEASURES 9 15/16" AND THE "J" LOCKING NOTCH IS 11/32" (0.344") DEEP: THIS IS THE CORRECT TUBE.
If your model 99M1 / 75 calls for the earlier model (the only difference is in the locking pin location - the overall lengths will be the same), you need part number 507122 found here.
