Polymer80 80% Lower Receiver and Jig Kit (LR-308)

About this product

Polymer80 80% Lower Receiver and Jig Kit (LR-308) For builders seeking a precision platform in the large-frame AR category, the Polymer80 80% Lower Receiver and Jig Kit (LR-308) represents a critical component for a custom .308 Winchester or 6.5 Creedmoor build. This kit provides the foundation needed to complete a serialized, semi-automatic rifle from an unfinished receiver. Designed specifically for the DPMS LR-308 pattern, this kit allows the builder to mill, drill, and assemble the lower at home using the included jig system. With a focus on repeatability and structural integrity, this kit offers a professional-grade solution for those who demand control over every aspect of their firearm’s architecture. Overview The Polymer80 80% Lower Receiver and Jig Kit (LR-308) is a complete package designed to transform a raw 80% blank into a functional lower receiver. The kit includes the unfinished polymer receiver, a dedicated multi-jig system, drill bits, end mill, and all necessary installation hardware. Unlike standard aluminum lowers, the polymer construction reduces overall weight without sacrificing dimensional accuracy. The LR-308 pattern ensures compatibility with a wide range of aftermarket parts, including triggers, buffer tubes, and grip assemblies. This kit is intended for individuals who possess the mechanical aptitude to complete the machining process with standard tools such as a drill press or handheld router. Features & Specs The Polymer80 80% Lower Re