The LMT Defense MRP 5.56mm 14.5" Piston Operation AR-15 Barrel is a premium, purpose-built component engineered specifically for LMT's monolithic receiver systems. This 14.5-inch barrel features a chrome-lined bore and chamber for exceptional corrosion resistance, extended service life, and consistent accuracy under sustained fire. Constructed from high-strength chromoly (CB) steel, it undergoes cryogenic treatment to enhance durability, relieve internal stresses, and improve overall longevity in demanding environments. With a 1:7" right-hand twist rate, it stabilizes a wide range of 5.56x45mm NATO projectiles, including heavier 62-77 grain options, making it ideal for both duty and precision applications.Designed exclusively for piston operation, this barrel incorporates a dedicated piston operating rod system that pairs seamlessly with LMT monolithic uppers, reducing carbon fouling in the receiver compared to traditional direct impingement setups. It includes a factory-installed A2 birdcage flash hider to effectively minimize muzzle flash and maintain low signature during low-light operations. The combination of piston reliability, chrome lining, and cryo treatment delivers a barrel that performs flawlessly in harsh conditions while maintaining tight tolerances and superior heat dissipation.Weighing just 2.18 pounds, this barrel strikes an excellent balance between maneuverability and robustness, perfect for mid-length carbine configurations in professional, law enforcement, or enthusiast builds. Whether upgrading an existing MRP platform or assembling a new piston-driven rifle, this LMT barrel ensures dependable performance and easy integration without the need for additional modifications.Purchase the LMT Defense MRP 5.56mm 14.5" Piston Operation AR-15 Barrel today at Battlehawk Armory and elevate your build with this premium component! Specifications: Weight: 2.18 lbs Caliber: 5.56x45mm NATO Rifling Twist Rate: 1:7" Barrel Length: 14.5" Barrel Material: Chromoly (CB) Operating Method: Piston