The LMT Monolithic 5.56x45 NATO 20" Rifle Length Barrel Black is purpose-built for the LMT MRP monolithic upper, delivering a balanced 20-inch chrome moly steel barrel with a rifle-length gas system for smooth, consistent cycling. Featuring a low-profile gas block, straight gas tube, and A2 birdcage flash suppressor, this assembly is coated and cryogenically treated to promote long-term durability and reliable performance with modern 5.56x45 NATO ammunition.

This barrel is well suited for precision-focused range work, training, and general-purpose rifle builds where stability and accuracy at distance are priorities. Its 1:7 twist rate supports a wide range of bullet weights, making it a versatile choice for shooters who demand dependable function and repeatable results. Backed by LMT Defense’s reputation for meticulous engineering and robust craftsmanship, this MRP barrel assembly integrates seamlessly into serious AR-15 platforms.

Key Features:

• Manufacturer: LMT Defense
• Model: MRP
• Caliber: 5.56x45 NATO
• Barrel Length: 20"
• Gas System Length: Rifle
• Twist Rate: 1:7
• Barrel Material: Chrome moly steel
• Barrel Finish: Manganese phosphate
• Operating Method: Direct impingement
• Item Weight: 1.5 lbs