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| MGD_PM-9 | |
|---|---|
 | |
| Type | Submachine gun |
| Place of origin | France |
| Service history | |
| In service | never |
| Production history | |
| Designer | Louis Debuit |
| Designed | late 1940s – early 1950s |
| Specifications | |
| Mass | 2.53 kilograms (5.6 lb) (unloaded) |
| Length |
|
| Barrel length | 213 mm (8.4 in) |
| Cartridge | 9 mm Parabellum, 7.65 mm Longue |
| Barrels | 213 millimetres (8.4 in) |
| Action | Delayed blowback |
| Rate of fire | 750 rpm |
| Effective firing range | 100 metres (110 yd) |
| Feed system | 32-round box magazine (MP-40 compatible) |
| Sights | Iron sights |
The MGD PM-9 was a French open bolt submachine gun, designed in the late 1940s or early 1950s by Louis Debuit and manufactured in small numbers by French firm Merlin and Gerin in the 1950s. [1] The PM9 was an unusual design in three different ways: it employed off-axis delayed blowback, it had a clock-style spiral mainspring similar to that of the Lewis gun, rather than the cylindrically-coiled spring used in the vast majority of self-loading firearms and, most unconventionally of all, used a rotating flywheel as a delaying mass in conjunction with the bolt. [2] It was furnished with a folding magazine, and some also had folding buttstocks, and this together with its original operating mechanism results in a highly compact weapon, but there is no known record of it being purchased or deployed by any military or police force. [2]
