The M4 carbine, a compact derivative of the M16 rifle tracing its roots to the Vietnam-era CAR-15, became the ubiquitous ...

Mr. Scales said the M4’s basic shortfall is that it uses gas, or direct, impingement to extract and expel its shells as opposed to a piston system. A piston firing mechanism is in the prolific ...

They shot him point-blank in the chest,” he said ... the Army was telling Congress that its rifles and machine guns, including the M4, had 25 “capability gaps,” including a need for greater ...

Infantry and other combat arms typically carry an M4 with a series of authorized add-ons, including Aimpoint red dot sights, Trijicon ACOG fixed-power rifle scopes, foregrips, laser designators ...

The M4 carbine, which was among guns found at businessman Jimmy Wangigi's home on Tuesday, is a shorter and lighter variant of the M16A2 assault rifle.According to Wikipedia, the M4 is a 5.56× ...

The Army has found its replacements for the M4 rifle and M249 Squad Automatic Weapon, handing out a contract to put new guns in the hands of tens of thousands of soldiers. The force is awarding a ...