Designed as a basic trainer to complement the M.416 in Italian military service, the MB.323 first flew in 1952.

It was a single-engine, low-wing cantilever monoplane powered by a nose-mounted Pratt & Whitney Wasp radial engine and a retractable tailwheel landing gear.

It had two tandem cockpits covered by a sliding one-piece canopy.

The type was evaluated against the Fiat G.49 which was preferred by the air force and the MB.323 did not enter production.

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