CMMG 300 Blackout 16.1" Barrel Sub-Assembly

CMMG 300 Blackout Barrel Sub-Assembly

This barrel sub-assembly from CMMG provides everything you need to build a reliable custom AR-15 upper receiver group. The 16.1-inch barrel is constructed from 4140 chromoly steel and finished with a durable salt bath nitride coating for corrosion resistance and longevity.

Key Features

• Barrel Length: 16.1 inches
• Caliber: 300 Blackout (300 AAC Blackout)
• Twist Rate: 1:7
• Material: 4140 Chromoly Steel
• Finish: Salt Bath Nitride (Black)
• Muzzle Threads: 5/8x24
• Extension: M4 barrel extension pre-installed and properly headspaced
• Profile: Multi-Role carbine profile

What You Get

This sub-assembly arrives with the M4 barrel extension already installed and properly headspaced, saving you time and ensuring precision. The 300 Blackout cartridge excels in short-barreled rifles, delivering excellent performance whether you're shooting supersonic or subsonic ammunition.

Why Choose This Barrel

The 4140 chromoly steel construction provides strength and durability, while the salt bath nitride finish offers superior wear and corrosion resistance compared to standard parkerizing. The 1:7 twist rate stabilizes a wide range of bullet weights, making this barrel versatile for various shooting applications.

Whether you're building a precision rifle or a versatile duty gun, this CMMG barrel sub-assembly delivers the quality and reliability serious shooters demand.