Читать книгу M16/M4 Handbook - Erik Lawrence - Страница 3

The M4 Carbine is a 5.56x45mm lightweight, air-cooled, gas-operated, magazine-fed, select-fire shoulder-fired assault rifle. The M4 fires from a closed bolt in either semiautomatic or three-round-burst mode while the M4A1 is either semiautomatic or full-automatic and is generally a special operations-specific model.

M4/M4A1

CALIBER- 5.56X45mm NATO

WEIGHT WITHOUT MAGAZINE- 5.9 pounds (2.68 kg)

EMPTY 30-ROUND MAGAZINE- 0.25 pounds (0.11 kg)

LOADED 30-ROUND MAGAZINE- 1 pound (0.45 kg)

OVERALL LENGTH-

33 inches (84 cm) Stock Extended

29.8 inches (76 cm) Stock Retracted

BARREL LENGTH- 14.5 inches (37 cm)

BORE CHARACTERISTICS- Hard chrome-lined, 6 Lands

METHOD OF OPERATION- Gas-direct system; rotating bolt

MUZZLE VELOCITY- 2800 feet/second (884 meters/second)

MUZZLE ENERGY- 1215 foot-pounds

EFFECTIVE RANGE- 600 meters

FRONT SIGHT- Adjustable front

REAR SIGHT- M16A4 target-style sight adjustable for windage and elevation to 600 meters

SIGHT RADIUS- 14.5 inches (37 cm)

CYCLIC RATE OF FIRE- 700-950 rpm

FIRE CONTROL SELECTION- Safe - Semi - Burst/Full Auto

UPPER RECEIVER- Flat top with detachable carrying handle

M16A2/A3/A4

CALIBER- 5.56X45mm NATO

WEIGHT WITHOUT MAGAZINE- 7.5 pounds (3.4 kg)

EMPTY 30-ROUND MAGAZINE- 0.25 pounds (0.11 kg)

LOADED 30-ROUND MAGAZINE- 1 pound (0.45 kg)

OVERALL LENGTH- 39.6 inches (1 m)

BARREL LENGTH- 20 inches (51 cm)

BORE CHARACTERISTICS- Hard chrome-lined, 6 Lands

METHOD OF OPERATION- Gas-direct system; rotating bolt

MUZZLE VELOCITY- 3110 feet/second (948 meters /second)

MUZZLE ENERGY- 1325 foot-pounds

EFFECTIVE RANGE- 600 meters

FRONT SIGHT- Adjustable front

REAR SIGHT- M16A4 target-style sight adjustable for windage and elevation to 600 meters

SIGHT RADIUS- 19.75 inches (50 cm)

CYCLIC RATE OF FIRE- 700-950 rpm

FIRE CONTROL SELECTION- Safe - Semi - Burst/Full Auto

UPPER RECEIVER- Flat top with detachable carrying handle

The barrel rifling twists vary from the original 1 turn in 12 inches (1/12) on the first M16 series guns shooting 55-grain bullets, to the current 1/7 twist on the M16A2/A4 service rifle and M4 Carbine. The faster twist is necessary to stabilize the longer, heavier SS109 62-grain bullet with steel penetrator used in M855 ammunition.