or MAC Mle 1931
Twin light machine gun (7,5mm)
The JM Reibel came in two different versions: type T (tourelle = turret) and F (for casemates and cupolas). The main difference was the way the
triggers were operated: the T model, for use in retractable turrets, made use of a Bowden cable. The F model was directly operated by a soldier, and
had the typical layout (handgrips and shoulder stocks. The F model was used in JM cupolas and casemates.
On the 24th of december 1931, firing tests were carried out at the casemate Bois de Kanfen-Est.
It soon proved to be an accurate weapon.
When mounted in a casemate, the JM was connected to a pipe in the wall by an extendable tube to drop the spent cases into the fossé (ditch).
In a cupola, a flexible tube was used.
Each JM Reibel needed around 20 litres of water per day for cooling purposes.
Barrels were put in a bucket of water when overheated, or cooled by spraying water on them with a portable water sprayer.
Different modes of fire were possible to achieve different effects. The image on the left was photographed inside a firing chamber of casemate Sinnesberg Est-Ouest and shows crew instructions.
- Exceptionally fast for a longer period of time
(half a magazine (75 rounds) per machine gun)
When to counter an assault with the aim to cross the barbed wire obstacles.
- The accelerated rate of fire
(450 rounds per minute (three full magazines per machine gun)
The machine guns are used one after the other. After 3 magazines have been spent on one machine gun, the second one is used. This way it allows the barrel of the first one to cool down.
This rate of fire was used for barrage To attack an area and destroy targets within it, rather than aimed at a specific target. and destructive fire To destroy strongpoints, dumps, stores, roads and railways behind enemy lines (for a maximum of 2 minutes).
- The normal rate of fire
(150 rounds per minute, 1 full magazine per weapon)
Firing in bursts for one minute per machine gun.
This rate of fire was used for neutralizingKnocks a target out of action temporarily. Does not require an extensive expenditure of ammunition and interdiction fire
To prevent effective use of an area or specific place, for example firing on a rail yard, assembly area, crossroad, etc.
- Slow rate of fire
Used for harassing fire
Designed to lower morale of the troops under
fire through denial of sleep, noise, and constant danger. Usually sustained or sporadic over a long period of time.
Ammunition 7.5 x 54mm (also used on the Fm 24/29)
|Model 1929 D
|Model 1929 C
|Model 1929 T
|Model 1929 TP