The M4 was a French submarine-launched ballistic missile (SLBM) deployed on the nuclear Redoutable-class submarines (except the Redoutable herself, which was not refitted).

They were the first French MIRV-capable nuclear missiles, with six 150 kilotonne warheads.

[1] They were replaced by the improved M45 SLBM missile which was in service aboard the Triomphant-class submarine.

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