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Colt M4



Overview


Colt M4 carbine

US marine firing an M4 carbine fitted with ACOG 4x scope.

Source: US Marine Corps (LCpl Mark Stroud) - © Public domain

Origin
United States
Type
Assault rifle
Entered service
1994
Status
In service
Development
1984 - 1993
Developer
United States - Colt
Production
1993 - present
Producers
United States - Colt
United States - Fabrique Nationale
Designations
XM4
Trials designation

Details


Facts M4 (R777)
General
Origin
United States
Type
Assault rifle
Caliber
Caliber
5.56x45mm NATO
Magazine
30 round detachable box
Barrel length
370 mm
Rifling
6 grooves, 178 mm right hand twist
Muzzle velocity
884 m/s
Operation
Action
Gas operated, direct impingement
Locking
Rotating bolt
Fire selector
0 - 1 - F
Rate of fire
700 - 950 rpm
Dimensions
Stock type
Retractable
Length
838 mm stock extended
757 mm stock retracted
Weight
2.68 kg empty
Sights
Type
Iron sights
Sight radius
368 mm

Related articles


Colt M16A2

The M4 is the carbine variant of the M16A2. The M4 has a shorter barrel and retractable stock.

Colt CAR-15

The Colt M4 is very similar to the older CAR-15, but is based on the NATO-caliber generation of the M16. Most variants of the M4 feature a heavier barrel than the CAR-15 and have a flattop receiver for mounting optics.