One Horse AR-15 Upper Parts Kit - Dust Cover and Forward Assist

One Horse's upper parts kit includes every component needed to complete a stripped AR-15 upper receiver — dust cover assembly, dust cover rod, dust cover spring, forward assist assembly, forward assist spring, and forward assist pin — in a single American-made package built from corrosion-resistant mil-spec components.

The One Horse OH-UPK01 Upper Parts Kit contains the complete hardware set required to finish a stripped A3 AR-15 upper receiver to fully assembled configuration. It is compatible with any mil-spec AR-15 upper receiver, including One Horse's OH-UR02 stripped upper, and ships ready for installation without modification.

A stripped upper receiver requires three sub-assemblies to become a functional, deployable upper: the dust cover (ejection port cover), which protects the chamber and bolt from debris when the rifle is not in use; the forward assist, which allows the operator to manually drive the bolt carrier into battery if the bolt does not fully close under spring pressure; and a barrel assembly with handguard. This kit provides the first two — dust cover and forward assist — as a matched set of mil-spec components machined from corrosion-resistant materials, with all associated springs, rods, and pins included so the builder does not need to source individual components. Installation uses standard AR-15 armorer tools and requires no gunsmithing. Made in the USA from U.S.-sourced materials — One Horse's standard across their complete component line.

Includes: dust cover, dust cover rod, dust cover spring, forward assist, forward assist spring, forward assist pin. Compatibility: mil-spec AR-15 standard upper receivers. Drop-in installation, no gunsmithing required. Materials: corrosion-resistant mil-spec components. Made in USA from U.S.-sourced materials.

All springs, rods, and pins included — no individual component sourcing required to complete the upper. Corrosion-resistant mil-spec construction throughout. American-made with U.S.-sourced materials per One Horse's stated manufacturing standard.

The right finishing kit for any mil-spec AR-15 upper build — everything needed to complete the dust cover and forward assist installation in one American-made package.