One Horse AR-15 Complete Upper | 7.5″ 5.56 NATO Pistol Upper Receiver

The One Horse AR-15 Complete Upper in 7.5″ 5.56 NATO is a compact, ready-to-run upper assembly built for AR pistol builds, home defense configurations, and close-quarters applications. This complete upper ships ready to drop onto any mil-spec AR-15 lower receiver, making it an ideal choice for builders looking to complete or upgrade their setup without the hassle of sourcing individual components.

At just 7.5 inches of barrel length, this upper delivers a highly maneuverable platform well-suited for pistol-length AR builds. Chambered in the widely popular 5.56 NATO, it offers broad ammunition compatibility and a well-established performance profile trusted by shooters across the country.

Whether you’re completing your first AR pistol build or adding a dedicated short-barrel upper to your collection, this One Horse complete upper offers solid value and straightforward mil-spec compatibility. Simply pair it with a compatible AR-15 pistol lower and you’re ready to go.

**Key Features:**
– Caliber: 5.56 NATO
– Barrel Length: 7.5″
– Complete upper assembly — drops onto any mil-spec AR-15 lower
– Compact configuration ideal for AR pistol builds
– Broad ammunition compatibility with 5.56 NATO and .223 Rem

*Note: This upper is intended for use on pistol-configured AR-15 lowers. Please verify all applicable local, state, and federal regulations before purchasing or assembling this product.*

Order online at Deep Roots Rifle Co or stop by our gun store in Eustis, Florida to see our full selection of AR-15 uppers, components, and custom build services. Our knowledgeable staff is here to help you find exactly what your build needs.