M19
M19或M-19、M19可以指：
- 梅西耶19，又称为NGC 6273，一个梅西耶天体
- 史密斯威森M19左輪手槍，Smith & Wesson Model 19
- Mk 19自動榴彈發射器，Mk 19 Automatic Grenade Launcher
| L19 | ||
| M18 | M19 | M20 |
| N19 | ||
| M19 | - | 19M |
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