M311 or M-311 may refer to:
- M-311 (Michigan highway)
- Alenia Aermacchi M-311, a turbofan-powered military trainer
- EML Wambola (M311), a Lindau-class minehunter of the Estonian Navy
- The CQ M-311, a variant of the Norinco CQ rifle
- The M-311 compass invented by Tuomas Vohlonen
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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