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 Marine Corps rejected adopting the M7 rifle, citing concerns about size, weight, and its unique mission requirements.

Why would one service decline a new rifle built for greater range and penetration while another is fielding it as a centerpiece of infantry modernization? The Marine Corps has now answered that ...

The Marines have decided to stick with the M27 Infantry Automatic Rifle instead of switching to the Army’s M7 Next Generation Squad Weapon rifle, a Marine Corps spokesperson told Task & Purpose. “The ...

The Marine Corps will keep the M27 automatic rifle as its standard service weapon rather than adopt the higher-caliber firearm being fielded by the Army, according to the amphibious force. “The Marine ...

The M27 Infantry Automatic Rifle is widely regarded as the most accurate and reliable service rifle Marines have ever fielded. Marines prefer weapons that prove reliable in harsh environments ...

The Marines may have backtracked on the rifle after a US Army expert disparaged it at an exhibition in Washington, DC, last year. The United States Marine Corps has increasingly made clear that it isn ...

Add Yahoo as a preferred source to see more of our stories on Google. U.S. Marine Corps Cpl. Kevin Manriques fires an M27 infantry automatic rifle during training at Twentynine Palms, California. (Cpl ...