The M4 carbine is a lightweight, magazine-fed, select-fire rifle that has become a mainstay in the world of firearms. Chambered in 5.56x45mm NATO, the M4 is known for its reliability, accuracy, and ease of use. It is used by military, law enforcement, and civilians alike.
**Keywords:**
* M4 carbine
* AR-15
* 5.56x45mm NATO
* rifle
* military
* law enforcement
* civilian
* reliability
* accuracy
* ease of use