Luth-AR LRPK-BLDR Lower Parts Kit AR-15 .223/5.56 NATO Black

Description

This Luth-AR LRPK-BLDR lower receiver builder kit supplies quality components for assembling or refurbishing an AR-15 lower receiver compatible with .223 Rem/5.56 NATO. Components are American-made and produced by investment cast or machined processes to MIL-SPEC drawings, materials, and heat treat standards. Springs in the kit are made from certified 17-4 SST and MIL-SPEC steel wire. The kit specifically avoids MIM components, reflecting a focus on traceable, serviceable parts.

Key Specifications

• The kit is chambered for .223 Rem/5.56 NATO compatibility.
• Designed for the AR-15 platform and intended for lower receiver assembly or repair.
• The product type is a Lower Parts Kit to outfit an AR-15 lower.
• The finish included with this listing is Black.
• The manufacturer is Luth-AR and components are American-made.
• Components are investment cast or machined to MIL-SPEC drawings, materials, and heat treat.
• Springs use certified 17-4 SST and various MIL-SPEC steel wire.
• The kit explicitly contains no MIM (metal injection molded) parts per the manufacturer.
• Intended use: builder/armorer-level lower receiver assembly with traceable components.

For builders and armorers who prioritize serviceable, traceable components, this Luth-AR lower parts kit provides MIL-SPEC manufacturing methods and certified spring materials to support reliable assembly and maintenance of an AR-15 lower receiver. Its American-made parts and avoidance of MIM offer a straightforward parts package for quality-focused builds and repairs.

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