This specification describes a common configuration for the M4 carbine platform, a widely used firearm. It denotes a barrel length of 14.5 inches chambered for the 5.56x45mm NATO cartridge. The CMV (cold hammer-forged, chrome-lined vanadium) designation refers to the barrel’s manufacturing process, known for its durability and accuracy. This specific length, coupled with the 5.56mm chambering, provides a balance between maneuverability and effective range, making it suitable for various operational environments.
A 14.5-inch barrel is often preferred for its compact size, facilitating movement in close quarters and confined spaces. The 5.56x45mm cartridge offers effective terminal ballistics at typical engagement distances. The cold hammer-forging process yields a barrel that is resistant to wear and tear, contributing to a longer service life. Chrome lining enhances the barrel’s resistance to corrosion and fouling, further increasing its longevity. These features combine to create a reliable and effective firearm configuration widely adopted by military and law enforcement agencies.