XM1203

The XM913 is an experimental American chain gun produced at Picatinny Arsenal. The cannon is a larger and more modern version of the 35 mm Bushmaster III chain gun, which itself is a larger version of the 25 mm M242 Bushmaster cannon. Although its shells, 50 x 228 mm, are twice the diameter of the 25×137mm cartridge of the M242, the 50mm cannon is not much longer than the smaller weapon. The overall lengths of the 25mm cannon and 50mm cannon are 105.2 inches (267 cm) and 117.7 inches (299 cm), respectively; while the portion of the gun that intrudes into the turret are 30.0 inches (76 cm) and 40.1 inches (102 cm), respectively.

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Frameless

Type	Subtype	Date	Description	Notes	Source