One Horse OH-CU03 Complete Upper 5.56 NATO 7.5"

The One Horse OH-CU03 is a complete AR-15 upper receiver kit chambered in 5.56 NATO, built around a 7.5" barrel. This compact upper configuration features a pistol-length gas system optimized for the short barrel length. The kit comes complete and ready to install on any mil-spec AR-15 lower receiver. Designed for close-quarters applications, this upper provides reliable cycling and performance in a compact package suitable for pistol builds and SBR configurations.