The M27 Infantry Automatic Rifle (IAR) is a lightweight, magazine-fed 5.56mm weapon used by the United States Marine Corps. It is intended to enhance an automatic rifleman’s maneuverability, and it is based on the Heckler & Koch HK416.
|Weight||7.9 lb (3.6 kg) empty|
|Length||36.9 to 33 in (940 to 840 mm) w/ adjustable stock|
|Barrel length||16.5 in (420 mm)|
|Width||3.1 in (79 mm)|
|Height||9.4 in (240 mm)|
|Action||Gas-operated short-stroke piston, rotating bolt|
|Rate of fire||Sustained: 36 rpm
Cyclic: 700 to 850 rpm
|Effective firing range||550 m (point target)
800 m (area target)
|Maximum firing range||3,938 yd (3,601 m)|
|Feed system||30-round magazine|
|Sights||3.5x Squad Day Optic, flip-up rear rotary diopter sight and front post|
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