LWRC International LWRCI ICMKII A5 .300 Blackout 10" Bbl OD Green SBR Upper ICMKIIU3ODG10S

The LWRCI ICMKII A5 .300 Blackout 10″ SBR Upper in OD Green is a performance‑oriented upper receiver assembly built around LWRC International’s proprietary short‑stroke gas piston A5 system, engineered for reliability and modularity in compact builds. Designed for the versatile .300 AAC Blackout cartridge, it features a cold‑hammer‑forged 10.5″ barrel with a 1:7″ twist rate and 5/8″‑24 TPI threaded muzzle, finished in Olive Drab (OD) Green Cerakote for rugged corrosion resistance and tactical style. The Monoforge one‑piece upper includes an integrated free‑float rail and a low‑profile two‑position adjustable gas block for tuning between suppressed and unsuppressed use, as well as ambidextrous charging handle compatibility. Sold as an upper‑only assembly, this OD Green SBR upper is ideal for pairing with a mil‑spec AR‑15 lower and NFA tax‑stamp approval to create a custom short‑barreled rifle. LWRC International LWRCI ICMKII A5 .300 Blackout 10" Bbl OD Green SBR Upper ICMKIIU3ODG10S