M4A1

IN PRODUCTION

The M4A1 is a fully automatic variant of the M4 carbine, a shorter and lighter version of the M16A2 assault rifle. It fires the 5.56×45mm NATO round and is the primary service rifle for many U.S. military units.

Quick Overview

Manufacturer

Colt / FN Herstal

Origin

United States

Production

1994 - Present

Caliber

5.56x45mm NATO

Calibers & Ammunition

5.56x45mm NATO

Dimensions

Overall Length

756mm (29.8 in) stock extended, 673mm (26.5 in) stock retracted

Barrel Length

368mm (14.5 in)

Weight

3.1 kg (6.8 lb) loaded

Mechanical

Action Type

Gas-operated, direct impingement

Trigger Type

Single-stage

Sights Type

Adjustable iron sights, MIL-STD-1913 rail for optics

Magazine Capacity

30 rounds standard