| Maynard Single Shot Percussion Carbine |
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| McMillan M88 |
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| McMillan TAC-338 |
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| McMillan TAC-338A |
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| McMillan TAC-50 |
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| Mecar M72 hand grenade |
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| Meinhard SMG |
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| Melior New Model |
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| Mendoza M1934 LMG |
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| Mendoza Puma |
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| Menz Model II |
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| Merkkisavuheite 80-16 smoke grenade |
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| Merwin & Hulbert Army Frontier 3rd Model |
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| Merwin Hulbert & Co. Pocket Revolver |
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| Merwin Hulbert pocket revolver |
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| Metro Arms American Classic Commander |
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| Micro Draco |
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| Micro Galil |
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| Micro Uzi |
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| Miles Lee Harris |
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| Milkor M32 MGL |
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| Milkor M32A1 |
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| Milkor MGL |
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| Milkor MGL Mk 1L |
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| Milkor MGL Mk 1S |
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| Milkor Mark 14 |
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| Milkor Mk 14 Mod 0 |
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| Milkor Mk. 14 Mod 0 |
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| Milkor Mk14 Mod 0 |
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| Milkor Stopper |
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| Mills Bomb |
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| Mine Launcher |
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| Minebea M-9 |
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| Minebea P9 |
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| Mini Ero |
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| Mini Uzi |
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| Mini-14 |
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| Mini-Uzi |
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| Mitchell High Standard |
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| Mk 1 hand grenade |
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| Mk 12 Mod 0 SPR |
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| Mk 12 Mod 1 Special Purpose Rifle |
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| Mk 13 Mod 0 |
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| Mk 14 Mod 0 EBR |
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| Mk 14 Mod 0 Enhanced Battle Rifle |
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| Mk 153 SMAW |
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| Mk 18 Mod 0 |
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| Mk 18 Mod 1 |
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| Mk 19 Grenade Launcher |
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| Mk 19 grenade launcher |
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