M1918 Browning Automatic Rifle 白朗宁自动步枪

The Browning Automatic Rifle (BAR) is a family of United States automatic rifles (or machine rifles) and light machine guns used by the United States and numerous other countries during the 20th century. This machine rifle is similar in function to other related World War I automatic rifles used for assaulting the enemy. Other light machine guns used by troops advancing across no-man's-land were the Chauchat, Benet-Mercie and the Lewis gun. The primary variant of the BAR series was the M1918, chambered for the .30-06 Springfield rifle cartridge and designed by John Browning in 1917 for the U.S. Expeditionary Corps in Europe as a replacement for the French-made Chauchat and M1909 Benét–Mercié machine guns that US forces had previously been issued.