One Horse OH-LPK01 AR-15 Complete Lower Parts Kit - Mil-Spec

The One Horse OH-LPK01 AR-15 Complete Lower Parts Kit delivers every small component needed to finish a stripped AR-15 lower receiver with a fully functional fire control group and all required pins, springs, and detents. Built to Mil-Spec dimensions, each part is precision-machined for clean, drop-in installation with no fitting required.

At the core sits a Mil-Spec single-stage trigger with proven mil-spec geometry and a crisp, reliable break at a 5.5-7 lb pull weight. The trigger is phosphate coated for long-term durability and corrosion resistance. It is paired with the matching hammer, hammer spring, trigger spring, and disconnector to round out the fire control group.

Beyond the fire control group, the OH-LPK01 includes every pin, spring, detent, and small component needed to fully assemble the lower receiver. All parts are finished in a uniform black to match standard mil-spec lowers and are intended for use on standard AR-15 platform builds. Whether completing a fresh lower or refreshing the internals of an existing rifle, this One Horse LPK supplies the complete small-parts package trusted by home builders and gunsmiths alike.