The ML-63 is a submachine gun manufactured by the Buenos Aires-based Halcon corporation.
The ML-63 is chambered in 9mm Parabellum and is fed from a 30-round magazine. The ML-63 also came with a fixed wooden stock, which appears to be based primarily on the MAT-49 Submachine Gun. An integrally suppressed version was also made. A number of ML-63 submachine guns were found by the British during the Falklands War in 1982.