No VACW battle is complete without at least a couple of BARs in the hands of the troops.
The Browning Automatic Rifle (BAR) is an automatic rifle (or machine rifle)/light machinegun used by the United State. The initial variant of the BAR series was the M1918, chambered for the .30-06 Springfield rifle cartridge. It was designed by John Browning in 1917 for the U.S. Expeditionary Corps in Europe as a replacement for the French-made Chauchat machine gun (a favorite entry in the worst machinegun in the world contest). The BAR was designed to be carried by advancing infantrymen, slung over the shoulder or fired from the hip, a concept called "walking fire"—thought to be necessary for the individual soldier during trench warfare. However in practice, it was most often used as a light machine gun and fired from a bipod. The problem was it really wasn't a light machine gun. Between the limited magazine (only 20 rounds) and a non-detachable thin barrel, it really didn't compare to a true light machinegun like a Bren or even a Lewis. However, with over 100,000 available (plus the Colt Monitor version, which lacked a bipod, which was used by the FBI, prison guards, police, etc.) in the early 30s in the United States they will be a common item in VACW battles. Every armory would have them in it, even major warships had up to 200 per ship for issue to naval landing forces. The version (M1918) available for VACW is capable of full- and semi-auto fire, and can be shoulder fired (don't try that with a regular light machinegun).
Depending on the system you use, you'll have to modify it down from a regular Light Machinegun.