This is a lot of 9 Madsen Model 50 machine gun 9mm magazines. Each one has a slot cut 3 - 1/2" from the top indicating they have been adapted to fit in some other 9mm machine gun. . So it is your guess as to what these may have been adapted to. CONDITION: Near excellent original finish except where notch has been cut at the rear rib. A fine opportunity for the Madsen machine gun owner.