The M4 carbine (officially Carbine, Caliber 5.56 mm, M4) is a 5.56×45mm NATO assault rifle developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle.

One of the most significant changes was the relocation of the main armament—initially a 75 mm gun—into a fully traversing turret located at the center of the vehicle. This design allowed for more flexible and accurate fire control, enabling the crew to engage targets with greater precision than was possible on the M3.

M4A4 hull with Caterpillar D200A turbocharged, air-cooled radial multi-fuel engine adapted from Wright G200; composite cast/welded hull lengthened similarly to the M4A4; 75mm gun only.

The M4-series Carbine achieves over 80% commonality with the M16A2 Rifle and replaces all M3 .45 caliber submachine guns, and selected M9 pistols and M16 rifles.

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Feb 18, 2024 · The maximum effective range of an M4A4 is around 600-800 meters. Is the M4A4 suitable for close-quarters combat? The M4A4 is well-suited for close-quarters combat due to its compact size and maneuverability.

Jul 7, 2011 · The M4 Carbine achieves over 80 percent commonality with the M16A2 Rifle and was initially to replace all M3A1 .45 caliber submachine guns and selected M9 pistols and M16 series rifle in service.

Nov 16, 2019 · Rugged, simple and accurate, the M4 carbine is the standard infantry weapon of not just the Army but all of America’s ground forces. The story of the M4 goes back to the mid-sixties and the...

Sep 29, 2023 · Officially adopted in 1994, the M4 carbine has only been gaining steam on the global stage ever since. Designated as Carbine, Caliber 5.56 mm, M4, the weapon has since been adopted by dozens of different nations and armed groups around the world. A plain-Jane Colt M4A1. Photo: Wikipedia.