Description
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) | ||
| Cartridge | 5.56×45mm NATO | ||
| Action | Gas-operated short-stroke piston, rotating bolt | ||
| Rate of fire | Sustained: 36 rpm Cyclic: 700 to 850 rpm |
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| Effective firing range | 550 m (point target) 800 m (area target) |
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| 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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