GAU-19
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The GAU-19/A is an electrically driven, three-barrel rotary heavy machine gun that fires the .50 BMG cartridge.
GAU-19
GAU-19/B mounted. Eurosatory Paris, 2016.
.50 BMG
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The .50 BMG, also known as 12.7×99mm NATO, and designated as the 50 Browning by the C.I.P., is a .50 in (12.7 mm) caliber cartridge developed for the M2 Browning heavy machine gun in the late 1910s, entering official service in 1921. Under STANAG 4383, it is a standard service cartridge for NATO forces, as well as many non-NATO countries. The cartridge itself has been made in many variants: multiple generations of regular ball, tracer, armor-piercing (AP), incendiary, and saboted sub-caliber rounds. The rounds intended for machine guns are made into a continuous ammunition belt using metallic links.
From left: .50 BMG, .300 Win Mag, .308 Winchester, 7.62×39mm, 5.56×45mm NATO, .22 Long Rifle
Left to right, rear: green/gray tip Raufoss Mk 211 HEIAP (high-explosive incendiary armor-piercing) yellow/red tip (M48 spotter) silver tip (M8 armor-piercing incendiary) light blue tip (M20 incendiary) black tip (M2 armor piercing) silver tip/red sabot (M962 SLAP-T) silver tip/amber sabot (M903 SLAP) red tip (M17 tracer) unpainted copper (M33 ball) Front row are 5.56×45mm NATO and .500 S&W Magnum, for size comparison
.50 BMG rounds and projectiles. Left to right: M2 ball M1 tracer M2 armor piercing M17 tracer M8 armor piercing incendiary M20 armor piercing incendiary tracer M1 incendiary M903 SLAP M962 SLAP-T XM156 spotter tracer
M9 links in use