Cmc Triggers Bbl-556-001 Ar15 556 Nato Brl 7.5 Pstl

The CMC Triggers AR-15 5.56 NATO barrel in 7.5" is a short-barreled rifle component engineered for shooters who want a compact, maneuverable platform without sacrificing reliability. Built from chrome moly vanadium steel and button rifled for consistent accuracy, this barrel pairs well with AR pistol builds, short-range tactical setups, or anyone looking to reduce overall length while maintaining standard NATO chambering. CMC Triggers barrels are manufactured to tight tolerances, ensuring proper headspace and reliable feeding across quality ammunition.

At 7.5 inches, this barrel strikes a practical balance for AR-platform shooters: it's short enough to build a truly portable rifle or pistol, yet long enough to maintain reasonable velocity and velocity consistency in 5.56 NATO. The chrome moly vanadium steel construction delivers durability and corrosion resistance, critical for barrels that see regular use or exposure to the elements. Button rifling produces uniform lands and grooves that support both accuracy and longevity.

This is a direct-fit component for standard AR-15 receivers and upper assemblies. Whether you're building a home-defense rifle, a truck gun, or an SBR (short-barrel rifle—with appropriate licensing), a precision barrel from a trusted manufacturer like CMC Triggers gives you the foundation for a dependable gun. Pair it with quality optics, a sound trigger, and good ammunition to build exactly what you need.

Key Features

• 7.5" barrel length for compact, maneuverable AR-15 builds
• 5.56 NATO chambering—widely available, proven ammunition
• Chrome moly vanadium steel—corrosion-resistant, durable
• Button rifled—consistent accuracy and reliable feeding
• Standard AR-15 platform compatibility

Specifications

Frequently Asked Questions

Will this 7.5" barrel work on my AR-15 upper receiver?

Yes, this is a standard AR-15 platform barrel and will fit any AR-15 upper receiver with the proper barrel extension (extension not included). Ensure your upper is properly assembled and headspaced before firing.

What ammunition does this barrel shoot?

It's chambered in 5.56 NATO, one of the most common and accessible rifle cartridges in the US. It will also typically fire .223 Remington, though 5.56 NATO is the designated caliber.

Is this barrel finished and ready to install?

Yes, the barrel is complete and ready to drop into a compatible upper receiver. You will still need appropriate tools, knowledge of AR-15 assembly, and a properly torqued barrel nut.

Why choose a chrome moly vanadium barrel?

Chrome moly vanadium steel is corrosion-resistant and durable, making it ideal for barrels that see regular use, field conditions, or exposure to moisture. Button rifling ensures consistent bore quality shot to shot.