The Seekins SP10M .308 Win 22" Black Complete Upper offers a ready‑to‑mount upper receiver assembly designed to bring the versatility and power of the .308 Winchester cartridge into an SP10 / AR‑10 platform with a full‑length barrel optimized for ballistics and stability. With its 22" barrel and free‑float M‑LOK handguard, this upper is suited for shooters who value long-range potential, modular flexibility, and dependable semi‑automatic performance. The SP3R handguard supports a wide array of accessories, making this upper adaptable for optics, bipods, lights, or other gear without compromising barrel harmonics. As a complete upper assembly, it simplifies rifle builds — eliminating the need to source multiple components individually — which makes it a practical choice whether you’re building for precision shooting, hunting, or general-purpose .308 performance.