M
M. B. Associates-GyrojetM.O.A. Corp.MacMadsenMagnum Research, Inc.Makarov PistolMalin, F. E.Maltby, Henley And Co.Manhattan Firearms CompanyMann, FritzMannlicher PistolMannlicher SchoenauerManufranceManurhinMarathon Products, Inc.Marble's Arms & Mfg. Co.MargolinMariette BrevetteMarlin Firearms Co.Marocchi ArmiMarsMarston, S.W.Marston, W. W. & Co.Masquelier, S. A.Massachusetts Arms Co.Mateba ArmsMatra Manurhin DefenseMaunz Mfg., Inc.Mauser WerkeMaverick Arms, Inc.Maynard/perryMcMillan & Co. Inc., G.McMillan FirearmsMead & AdrianceMendenhall, Jones & GardnerMenz, AugustMercuryMercury(2)Meriden Firearms Co.Merkel, GebruderMerrillMerrill, James H.Merrill, Latrobe & ThomasMerrimack ArmsMerwin & BrayMerwin Hulbert & Co.Metro Arms CorporationMetropolitan Arms Co.MiidaMiller ArmsMiltechMinneapolis F. A. Co.Miroku B. C.Mitchell Arms, Inc.Mitchell's MausersMk Arms, Inc.MkeModesto Santos Cia.Montenegran-GasserMoore's Patent Firearms Co.Morgan & ClappMoriniMorroneMorseMossberg, O. F. & Sons, Inc.Mountain ArmsMountain Rifles, Inc.Mugica, JoseMurfeesboro ArmoryMurphy & O'connelMurray, J. P.MusgraveMusketeer Rifles