They had lightweight barrels as well as ammunition fed only within the left side. Provider trials lifted doubts about whether or not the guns will be ideal for plane or for anti-aircraft use. A significant barrel M1921 was viewed as for floor vehicles.[22] The GAU-eighteen/A is a lightweight variant from https://bookmarking1.com/story16885796/helping-the-others-realize-the-advantages-of-browning-rifles