higher rate of fire, accelerated fire was limited to a maximum of two minutes per gun, since the guns would be so heated after firing 6 magazines each, they would be ready to overheat, even with a minute to cool down after the first 3 magazines. Rapid fire; In cases of emergency, such as enemy crossing the barbed wire, the gunners were authorized to rapid-fire bursts of 75 rounds per gun, either in turn or simultaneously, allowing a full magazines worth to be fired in much less than a minute. Such a rapid rate would very quickly overheat the barrel if not limited to only 75 rounds. To help cool the guns down faster, buckets of water and water sprayers were kept next to each JM emplacement. Barrels were cooled either by spraying them with water (evaporative) or by removing the gun from the mount and dipping the barrel into the water bucket. Up to 20 liters of water could be used per day per emplacement just to cool the barrels. The JM mount consisted of a thick, metal, square frame, sized to fit into a standard French fortification embrasure (opening); the guns were mounted on an equally heavy-duty pivoting cradle inside this frame. The square frame fit snugly into the embrasure and was attached by hinges and bolts. This ensured that there were no gaps where enemy bullets could enter into the bunker (except the very small opening that the telescopic sight peeped through), yet allowed the guns to be aimed and trained on anyone outside the walls. Emplacements were often shared with an anti-tank gun sharing the same embrasure opening; the JM mount would be hinged back, and the anti-tank gun slid forward on its ceiling-mounted rail, until its barrel was outside and breech inside. It was surrounded by a similar square frame, which fit tightly into the embrasure. The only time the occupants of the bunker were exposed to enemy fire, was in the brief moments when switching the machine gun mounting for an artillery mount. Users , used on the Hotchkiss H35 light tank. , used dismounted by governmental Armée Nationale Tchadienne during Chadian Civil War (1965–79). , used on the Renault UE Chenillette. , used on the Hotchkiss H35 light tank. , used on armoured vehicles, such as AMR 33, Renault FT or Panhard EBR and on fortifications. During the Indochina War, M1931As were used