Final answer:
During America's involvement in World War I, the government authorized the production of a new service rifle with a five-round magazine, firing .30-06 rounds. The significance of machine guns rose as they demonstrated their effectiveness in trench warfare, leading to a substantial increase in their production and use by the end of the war.
Step-by-step explanation:
In response to the question regarding different weapons authorized component bars, it is important to consider the historical context. During the time of America's entry into World War I, the government moved to equip its military forces with the necessary weapons to support nearly 4 million recruits. Initially, the federal government had 600,000 service rifles.
However, to meet the demand, American manufacturers like Remington and Winchester were contracted and they were able to produce a new service rifle inspired by the British Enfield rifle. This weapon featured a five-round magazine and was capable of firing a .30-06 round.
The postwar surplus led to veterans keeping their rifles, which popularized the .30-06 cartridge among hunters and sportsmen. Moreover, the first automatic weapon, which used recoil to operate, was invented by an American, Hiram Maxim. During the war, the concept of machine guns evolved significantly as the static form of trench warfare proved how effective these weapons could be. At the beginning of the war, France had only 2,500 machine guns, but by the end, they possessed over 300,000, highlighting the dramatic shift in military armament strategy.