ArmyTimes Stick to your guns: Why the Marine Corps is opting for the M27 over the Army’s M7
The M27 IAR is chambered for 5.56mm NATO legacy cartridge, while the M7 rifle is chambered for the larger and more modern 6.8mm round.
The M27 IAR is chambered for 5.56mm NATO legacy cartridge, while the M7 rifle is chambered for the larger and more modern 6.8mm round.