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The M46 Light Anti-Aircraft Gun is a United Nations Space Command Defense Force mounted machine gun. It replaced the M41 Light Anti-Aircraft Gun as the primary armament on the standard M12 Light Reconnaissance Vehicle at some point before 2557.
The M46 is visually different, with a more squarish blast shield instead of the traditional hexagonal shape and is less angular. The weapon appears beefier, with longer and straighter barrels and a metallic brace. Also, mechanically, the weapon loses accuracy as the reticle blooms, and overheating is quicker and less tolerant. But the damage has been increased and the range has been extended.