In 1934, the ''Manufacture d'Armes de Châtellerault
(Châtellerault weapons manufacturing company, often shortened to MAC
) completed the development of the MAC 1934 machine gun to replace the Darne mod. 1933 machine gun aboard aircraft of the Armée de l'Air''. Essentially a faster-firing variant of the
mitrailleuse mle 1931, and using the same
7.5 mm MAS ammunition, the
MAC 34 worked by gas operation and was fed from drum magazines. Two main variants, sharing common parts, were introduced: • the
type tourelle (turret model), fed from 100-round replaceable magazines, was used in flexible mountings, where it was generally fitted with an Alkan 1935
reflector gunsight. • the
type aile (wing model) fed from a 300- or 500-round drum magazine, was used for fixed mountings. Because it used an
open bolt action, the MAC 34 could not be fitted with
synchronization gear, and was more expensive to manufacture than comparable weapons; but it was compact and had excellent reliability. Originally the ''Armée de l'Air'' favoured magazine-fed weapons, but it eventually accepted that the feeding system of the MAC 34 would require too frequent reloadings for dorsal gunners, and was impractical for wing mountings, so it required the development of a belt-fed variant. The resulting weapon was introduced in 1939, and designated as
MAC 1934 M39. ==Overview==