The M4A1 carbine is a fully automatic variant of the basic M4 carbine. The M4A1 was developed in May 1991 and entered service in 1994; starting in 2014 the U.S. Army began upgrading all of its existing M4s to the M4A1 standard. [69] The M4A1 was …

This warning summary contains general safety warning and hazardous materials warnings that must be understood and applied during operation and maintenance of this equipment.

The M4A1 is a 5.56mmx45mm NATO caliber weapon with a gas operated, rotating bolt action. The carbine is typically fed from 30-round STANAG magazines. A single Picatinny rail is Featured atop the M$A1's M16A3-style falt-top receiver for mounting scopes, sights or a carrying handle.

The M4/M4A1 5.56mm Carbine is a lightweight, gas operated, air cooled, magazine fed, selective rate, shoulder fired weapon with a collapsible stock. It is now the standard issue firearm for...

As a primary infantry weapon, the M4 carbine can be fitted with a knife-bayonet, an underbarrel grenade launcher such as M203 or M320, a sound suppressor, and a host of other accessories such as tactical flashlights, laser designations, and various day and night sights.

The M4A1 is a fully automatic variant of the M4 carbine – a shorter and lighter variant of the M16. It went into service in 1994 to replace the M16 in certain roles. The M4A1 trigger group operates on either Safe, Semi-Automatic, or Fully Automatic settings.

Jul 1, 2006 · The top barrel is the standard M4 carbine contour light barrel. The bottom barrel is equipped on all M4A1 carbines being delivered to SOCOM forces. Note the significantly heavier barrel and the slot cut into the barrel. These slots enable the M203 grenade launcher to be mounted to the carbine.

Carbines and parts shall conform to the materials and construction requirements specified herein, on Drawing 12972700 and drawings applicable thereto, and be in accordance with the applicable materials and construction provisions of MIL-W-13855.

Understanding the different parts of the M4 Carbine is essential for maintenance, customization, and overall knowledge of this weapon. Upper Receiver: The upper receiver houses the barrel, bolt carrier group, and other internal components. It is responsible for containing and guiding the ammunition during the firing process.

The M4A1 is fully automatic and incorporates an ambidextrous fire control selector. The weapon can be mounted with the M203A2 Grenade Launcher, M320A1 Grenade Launcher or the M26 Modular...