Lmt Monolithic 5.56X45 Nato 16'' Mid Length Bbl Black

The LMT Monolithic 5.56×45 NATO 16" mid-length barrel is purpose-built for shooters who demand precision engineering in a complete upper receiver system. LMT Defense designed this barrel specifically to work within their monolithic receiver platform, which integrates the barrel, rail, and receiver into one rigid structure for superior accuracy and durability. The 16-inch mid-length configuration balances velocity, handling, and sight radius—a versatile length for everything from duty and tactical applications to general-purpose rifle builds.

This barrel comes equipped with a low-profile gas block and straight gas tube, keeping your rifle's profile compact while maintaining reliable operation. The A2 birdcage flash hider reduces muzzle flash signature, useful whether you're training indoors or operating in low-light conditions. Built from chromoly steel and cryogenically treated, the barrel undergoes LMT's rigorous durability process to withstand thousands of rounds and repeated thermal cycles without premature wear or accuracy loss. A quality barrel is the foundation of a quality rifle—this one proves it.

If you're assembling or upgrading an LMT monolithic upper, or you're shopping for a replacement barrel that fits the LMT ecosystem, this 16-inch mid-length delivers the accuracy and longevity competitive shooters and serious riflemen expect. The 1:7" right-hand twist rifling handles a full range of 5.56×45 ammunition, from 55-grain varmint loads to 77-grain match rounds.

Key Features

• 16-inch mid-length barrel—ideal balance of velocity, handling, and sight radius
• Chromoly steel construction with cryogenic treatment for extended service life
• Low-profile gas block and straight gas tube for compact profile
• A2 birdcage flash hider to reduce muzzle signature
• 1:7" right-hand twist rifling—compatible with a broad spectrum of 5.56×45 ammunition
• Designed for LMT monolithic receiver platforms

Specifications

Frequently Asked Questions

Will this barrel fit my rifle?

This barrel is designed specifically for LMT monolithic receiver systems. It integrates with the LMT monolithic platform—not a standard AR-15 upper receiver. If you're building with LMT Defense components, this barrel is your fit.

What ammunition does the 1:7" twist handle?

The 1:7" right-hand twist rifling stabilizes a full range of 5.56×45 NATO loads, including 55-grain, 62-grain, 69-grain, 77-grain match ammunition, and heavier rounds. It's one of the most versatile twist rates for the cartridge.

Why cryogenic treatment?

Cryogenic treatment refines the steel's grain structure and stress distribution, reducing wear and improving durability. Combined with chromoly steel, this process extends barrel life and helps maintain accuracy over extended shooting sessions.

Does this come complete, or do I need additional parts?

This is a barrel only. Assembly into an LMT monolithic upper or integration into another system requires the appropriate receiver, gas block, and other components as needed for your build.