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Colt
Overview
The Colt AR-15 M4CQB 5.56 Barrel features a compact 10.3-inch length, designed for enhanced maneuverability in close-quarters scenarios while maintaining accuracy and reliability. Chambered for 5.56 NATO, this barrel is optimized for performance with a variety of ammunition types, making it a solid choice for builders looking to create a versatile tactical firearm. This barrel is commonly used in short-barreled rifle builds focused on CQB applications.
Specifications
AR-15 M4CQB 5.56 Barrel 10.3in - M4CQB Replacement Barrel Stripped 10.3in
Available Merchants(1)
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Build history on GunPartPicker
Builders on GunPartPicker first added the Colt AR-15 M4CQB 5.56 Barrel 10.3in - M4CQB Replacement Barrel Stripped 10.3in to a build in April 2026.
Today the one retailer we track is out of stock. Listed prices start at $239.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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