As a light-weight anti-aircraft (AA) gun in certain ships; up to 6 M2 guns might be mounted on exactly the same turret. The GAU-eighteen/A is a lightweight variant of the M2/M3 which is utilised over the USAF's MH-53 Pave Lower and HH-60 Pave Hawk helicopters. These weapons utilize the M2HB https://bookmarkforce.com/story16980215/the-definitive-guide-to-browning-firearms