The Seekins SP10M .308 Win 18" FDE Complete Upper is a ready‑to‑mount, modular upper assembly that brings the enduring reliability of the .308 Winchester cartridge into a compact, versatile AR‑10 platform. With an 18" barrel, 1:8" twist, and flat dark earth finish, this upper balances ballistic performance and maneuverability, making it ideal for tactical use, hunting, or range work. The free‑float M‑LOK handguard and threaded muzzle provide flexibility for mounting accessories or suppressors, while the billet receiver and adjustable gas system ensure reliable cycling and strong structural integrity under recoil. Compatible with standard AR‑10 pattern lowers and magazines, it delivers a solid balance of power, accuracy, and modularity in a form factor that remains practical and adaptable for many shooting applications.