AR-15 Mil-Spec Lower Parts Kit

Complete your AR-15 build or perform crucial field maintenance with the AR-15 Mil-Spec Lower Parts Kit (LPK). Engineered to exact military specifications, this complete lower receiver parts kit includes every high-grade component required to assemble a fully functional, reliable lower receiver platform for your rifle or pistol build.

Manufactured from durable heat-treated steel and premium spring alloys, every component in this kit is built to withstand harsh recoil, friction, and demanding conditions. The included single-stage Mil-Spec trigger group delivers a clean, consistent pull, while the classic A2 pistol grip provides a comfortable, familiar hold. Standard safety selector, bolt catch, magazine release, and takedown pin assemblies ensure seamless compatibility with any standard Mil-Spec AR-15 lower receiver.

Whether you are starting a fresh custom build from an 80% or stripped lower receiver, or keeping extra replacement components in your range bag for unexpected repairs, this kit provides smooth function and rock-solid reliability.

Key Features & Specifications:

• Complete Mil-Spec Assembly: Contains all necessary pins, springs, plungers, controls, and detents for an AR-15 lower receiver.
• Fire Control Group Included: Complete single-stage Mil-Spec trigger, hammer, disconnector, and trigger springs.
• Ergonomic Control: Includes standard A2 pistol grip, trigger guard, and mounting hardware.
• Durable Materials: Precision-machined from heat-treated steel components with durable protective finishes.
• Universal Compatibility: Standard fitment for all Mil-Spec AR-15, AR-9, and multi-caliber lower receivers.
• Ideal for Builds & Repairs: Perfect for completing stripped lower receivers or maintaining a spare emergency repair pack.