The LWRCI IC-PSD/ICMKII A5 Patriot Brown 8? Upper is a high-quality short-barrel AR-pattern upper receiver assembly built on LWRC International’s proprietary short-stroke gas-piston system, engineered for reliability and smooth operation in compact configurations. Chambered for 5.56 NATO and finished in Patriot Brown Cerakote for rugged corrosion resistance and distinct styling, it includes a cold-hammer-forged barrel with an 8? (nominal) profile and 1:7? twist optimized for consistency in short-barrel use. The upper incorporates a free-float modular rail system, LWRCI Skirmish backup iron sights, and an ambidextrous charging handle, and is designed to mate with any standard AR-15 mil-spec lower to complete a custom build that balances compact handling with premium LWRCI build quality and piston reliability. LWRC International LWRCI ICMKII PSD 8" Bbl Patriot Brown Upper ICMKIIU5PBC8