Lmt Defense167527909
Lmt Monolithic 5.56X45 Nato 16'' Mid Length Bbl Black$554.40
Availability: In Stock
The LMT Defense Monolithic 5.56×45 NATO 12.5" mid-length barrel is built for shooters who demand precision and reliability in a compact platform. Engineered specifically for LMT's monolithic receiver systems, this barrel combines proven direct impingement operation with purpose-built components that reduce flash signature and support consistent accuracy. The 12.5" length hits a sweet spot for CQB-oriented rifles, short-range drills, and specialized tactical builds without sacrificing ballistic performance in the 5.56 NATO chamber.
LMT's commitment to durability shows in the details. The chromoly barrel stock receives a protective coating and cryogenic treatment—processes that enhance longevity under sustained fire and demanding field conditions. A 1:7" right-hand twist rate stabilizes a wide range of 5.56 ammunition, from lighter training loads to heavier 77-grain match rounds. The integrated low-profile gas block and straight gas tube simplify the upper receiver assembly while keeping profile minimal, and the A2 birdcage flash hider helps manage muzzle signature on shorter barrels where flash can be more pronounced.
Chrome lining in the bore and chamber resists corrosion and speeds cleanup after shooting, whether you're running suppressed, in adverse weather, or through extended training cycles. This is a no-compromise barrel for shooters who understand that a monolithic platform demands quality components to perform at its design potential. If you're building a precision 5.56 rifle, running a short-barreled defensive or competition setup, or upgrading an LMT receiver with a proper barrel, this 12.5" option delivers the rigidity and accuracy potential the system is known for.
| Caliber | 5.56×45 NATO (.223) |
| Barrel Length | 12.5" |
| Barrel Profile | Mid-length |
| Twist Rate | 1:7" RH |
| Material | Chromoly |
| Bore Lining | Chrome lined |
| Operating System | Direct Impingement |
| Gas Block | Low-profile, integrated |
| Gas Tube | Straight |
| Muzzle Device | A2 birdcage flash hider |
| Finish | Black |
| Designed For | LMT monolithic receiver |
Yes—this barrel is engineered specifically for LMT monolithic receiver platforms. The integrated gas block and low-profile design are matched to LMT's system geometry.
The 1:7" right-hand twist is stable across the full spectrum of 5.56 NATO ammunition, including lighter training rounds and heavier 77-grain match loads.
Both the bore and chamber are chrome lined, providing corrosion resistance and easier cleaning throughout the barrel's life.
Yes. The A2 birdcage threads accept standard 1/2×28 suppressors. The 12.5" length and flash hider are designed with short-barrel suppressed shooting in mind.
SKU: 167528777 • Weight: 2.18oz
Availability: In Stock
The LMT Defense Monolithic 5.56×45 NATO 12.5" mid-length barrel is built for shooters who demand precision and reliability in a compact platform. Engineered specifically for LMT's monolithic receiver systems, this barrel combines proven direct impingement operation with purpose-built components that reduce flash signature and support consistent accuracy. The 12.5" length hits a sweet spot for CQB-oriented rifles, short-range drills, and specialized tactical builds without sacrificing ballistic performance in the 5.56 NATO chamber.
LMT's commitment to durability shows in the details. The chromoly barrel stock receives a protective coating and cryogenic treatment—processes that enhance longevity under sustained fire and demanding field conditions. A 1:7" right-hand twist rate stabilizes a wide range of 5.56 ammunition, from lighter training loads to heavier 77-grain match rounds. The integrated low-profile gas block and straight gas tube simplify the upper receiver assembly while keeping profile minimal, and the A2 birdcage flash hider helps manage muzzle signature on shorter barrels where flash can be more pronounced.
Chrome lining in the bore and chamber resists corrosion and speeds cleanup after shooting, whether you're running suppressed, in adverse weather, or through extended training cycles. This is a no-compromise barrel for shooters who understand that a monolithic platform demands quality components to perform at its design potential. If you're building a precision 5.56 rifle, running a short-barreled defensive or competition setup, or upgrading an LMT receiver with a proper barrel, this 12.5" option delivers the rigidity and accuracy potential the system is known for.
| Caliber | 5.56×45 NATO (.223) |
| Barrel Length | 12.5" |
| Barrel Profile | Mid-length |
| Twist Rate | 1:7" RH |
| Material | Chromoly |
| Bore Lining | Chrome lined |
| Operating System | Direct Impingement |
| Gas Block | Low-profile, integrated |
| Gas Tube | Straight |
| Muzzle Device | A2 birdcage flash hider |
| Finish | Black |
| Designed For | LMT monolithic receiver |
Yes—this barrel is engineered specifically for LMT monolithic receiver platforms. The integrated gas block and low-profile design are matched to LMT's system geometry.
The 1:7" right-hand twist is stable across the full spectrum of 5.56 NATO ammunition, including lighter training rounds and heavier 77-grain match loads.
Both the bore and chamber are chrome lined, providing corrosion resistance and easier cleaning throughout the barrel's life.
Yes. The A2 birdcage threads accept standard 1/2×28 suppressors. The 12.5" length and flash hider are designed with short-barrel suppressed shooting in mind.
SKU: 167528777 • Weight: 2.18oz