MG 17 machine gun
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The MG 17 was a 7.92 mm machine gun produced by Rheinmetall-Borsig for use at fixed mountings in many World War II Luftwaffe aircraft, typically as forward-firing offensive armament. The MG 17 was based on the older MG 30 light machine gun, as was... Wikipedia
Action: Recoil operated, firing from closed bolt
Barrel length: 600 mm (24 in)
Caliber: 7,9 (7,92+0,04)
Muzzle velocity: from 885 m/s (2,900 ft/s) (Phosphor "B" round) to 905 m/s (2,970 ft/s) (Armor Piercing Tracer "SmK L'spur" round)
Rate of fire: 1,200 rpm
Used by: Nazi Germany