Luth-AR Lower Parts Kit Builder – AR-15 Compatible

The Luth-AR Lower Parts Kit Builder provides the essential components needed to complete an AR-15 lower receiver build. This kit includes the trigger assembly, hammer, disconnector, safety selector, magazine catch, bolt catch, pivot pins, takedown pins, and all necessary springs and detents. It's designed for builders who already have a grip, trigger guard, and buffer system, allowing you to customize those components separately.

Constructed from mil-spec steel and aluminum components with a black oxide or phosphate finish, this kit meets standard AR-15 specifications for reliable function. Installation requires basic armorer's tools including punches, a hammer, and patience—particularly when installing the pivot pin detent and safety selector spring. Experience with AR-15 assembly is recommended, though detailed instruction guides are widely available online.

• Part Type: Lower Parts Kit (Builder Configuration)
• Compatible Firearms: AR-15 and mil-spec AR-15 pattern rifles
• Material: Steel and aluminum components
• Finish: Black oxide/phosphate
• Installation: Requires armorer's tools and knowledge; professional installation recommended for first-time builders
• Includes: Trigger assembly, hammer, disconnector, safety selector, magazine catch, bolt catch, pins, springs, and detents (excludes grip, trigger guard, and buffer components)