The high-speed German aircraft gun that was too fast for its own good

Wars & Conflicts · Published 16 October 2026 Swipe more like this →

In short: Designed for the Luftwaffe in the early 1930s, the MG 15 was a modular marvel. But its blistering firing rate and complex reloading process created a deadly vulnerability, leaving gunners exposed to enemy fighters during the frantic seconds it took to swap magazines.

The MG 15 was a 7.92 mm machine gun engineered specifically for defensive roles in Luftwaffe aircraft. Developed from the Rheinmetall MG 30, it utilized a rotating bolt and lockring system—a design evolution from the tipping lock systems used in earlier Bergmann models. Its modularity allowed for various attachments, but its mechanical nature dictated its tactical limitations. Because it operated from an open bolt, it was fundamentally unsuitable for synchronized forward-firing through a propeller.

The weapon's performance was characterized by extreme speed and logistical difficulty. It boasted a firing rate exceeding 1,000 rounds per minute, meaning a standard magazine could be depleted in just 4.5 seconds. To manage this, gunners typically carried at least 10 spare magazines. These magazines, known as 'saddle-drums,' featured two symmetrical spiral drums that straddled the receiver. While some mistakenly claim these held 150 rounds, they actually held 75, with the ammunition shared evenly between the two sides.

As combat technology advanced, the MG 15 became redundant in its primary aerial role. Starting in late 1940, it was phased out in favor of more advanced options like the belt-fed MG 81, the twin-MG 81Z, the 13 mm MG 131, or the 20 mm MG 151/20 cannon. However, the gun found a second life on the ground. By January 1, 1944, official records indicated that approximately 17,648 units had been converted for infantry use, though the actual number of conversions was likely higher.

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