M231 Sub-Machine Gun
Type: Carbine
Caliber: 5.56mm
Range: 50m point target
Rate of Fire: 1300 rpm
Weight: 9.5 lbs (4.3 kg)
Magazine: 30rd box
Maker: FN Manufacturing
The M231 firing port weapon is lightweight, air-cooled, gas-operated, cartridge magazine fed, mounted in a ball firing port in the vehicle. The M231 fires on full automatic only, beginning from open bolt carrier and striker assembly position.