Military grade firearms left over from the occupation and liberation were used by violent criminals to outgun police personnel.

It has also seen service with military, police, and armed groups elsewhere in the world, most predominantly in the former French colonial empire.

Every MR 73 is match grade accurate, shipped with its own factory test target fired at 25 m (27.3 yd).

The MR 73 has an adjustable trigger weight in both double-action and single-action modes, a feature found in other high-end revolvers such as those built by Korth and Janz.

Though the patents expired decades ago, no other revolver manufacturer tried to apply the MR 73 trigger mechanism.

The factory guarantees that the cylinder will not burst or show any bulging or deformation with .357 Magnum ammunition developing double the C.I.P.

The 9×19mm Parabellum cylinder uses the Pilorget system that employed an ejector bordered by elastic piano wire that engaged its extractor groove.

The production of Police/Defense fixed sight MR 73 variants with 2½", 3", and 4" inch barrels, chambered in 9×19mm Parabellum and .357 Magnum started in 1973.

The MR range culminated in 1987 with the Convertible model, fitted with interchangeable, tension fitted barrels fed by hand-detachable cylinders chambered in .38 Special, .32 S&W Long, and .22 Long Rifle, with the aid of a frame-mounted firing pin selectable for center fire or rimfire ignition.