The LWRC IC-PSD 5.56mm NATO 8.5? Black Personal Security Detail Complete Upper Receiver (ICMKIIU5B8) is a premium, battle-ready component built to elevate AR-platform rifles with LWRC’s advanced engineering and durability. At its core is a cold-hammer-forged 8.5? barrel with a 1:7? twist and 1/2×28 muzzle threading, providing stable performance with a wide range of 5.56 NATO ammunition and easy compatibility with flash hiders or suppressors. Mounted in LWRC’s rugged Monoforge™ upper with a user-configurable modular rail and full Picatinny top rail, this upper allows seamless attachment of optics and critical accessories. The patented short-stroke gas piston system minimizes heat and carbon fouling in the receiver for enhanced reliability and simplified cleaning, while the nickel-boron coated bolt carrier and ambidextrous charging handle ensure smooth operation and long-term durability. Complete with Skirmish™ backup iron sights, an efficient flash hider, and high-quality piston-driven design, this IC-PSD upper is an excellent choice for tactical builds, personal defense configurations, or any shooter seeking a high-performance 5.56 NATO compact rifle platform. LWRC International LWRC IC-PSD 5.56mm NATO 8.5" 1:7" 1/2x28 Bbl Black Personal Security Detail Complete Upper Receiver ICMKIIU5B8