This Mossberg manufactured early variation magazine bar has the forward hole (center) approximately 1" back from the end and an extra (third) unused hole 1 3/8" behind the rear mounting hole. This magazine bar is for the model 46B bolt action rimfire rifle and is in very good condition with a few specks of rust and light wear. (file photo)
For magazine tube that measures 23 1/2" (including extended spring 25 1/2").
