The 1920s and 1930s observed the gradual acceptance of the M2 into each assistance from the U.S. military, such as the Coastline Guard. By the beginning of Earth War II, the M2 was the typical weapon for U.S. fighter and bomber plane, tanks and scout cars, and the first antiaircraft https://machguns.com/product/heckler-koch-hk33k-5-56mm-machine-gun-pre86-dealer-sample/