The CMC Triggers Barrel (brand part no. BBL556001) is a 7.50-inch, 5.56 NATO chrome moly vanadium steel barrel that is button rifled for consistent accuracy in a compact AR pistol-length build. CMC Triggers cuts this barrel with a 1:7-inch twist rate, matched to the heavier bullet weights common in short-barrel 5.56 builds, giving shooters a reliable option for a lightweight, maneuverable AR pistol or braced upper. It is a solid, no-frills choice for a builder replacing a worn barrel or finishing a short-barreled AR pistol project.

Key Specifications

• Chambered in 5.56 NATO.
• 7.50-inch barrel length suited to AR pistol-length builds.
• 1:7-inch twist rate, matched to heavier 5.56 bullet weights.
• Machined from chrome moly vanadium steel for strength and heat resistance.
• Button-rifled for consistent bore dimensions and accuracy.

Frequently Asked Questions

What caliber is this barrel chambered in? 5.56 NATO.

What twist rate does it use? A 1:7-inch twist, suited to heavier 5.56 bullets.

Buy the CMC Triggers 7.50-Inch Barrel

Finish out a compact 5.56 build with a button-rifled barrel built for reliability. Order it from our AR barrels selection at our Lubbock, Texas gun shop for fast, direct shipping.