Lower Parts Kit Mil-spec

The Lower Parts Kit Mil-spec from Geissele Automatics is essential for building a reliable AR-15, catering to both shooters and gunsmiths who prioritize precision and durability. This kit consolidates all necessary small components—trigger group, hammer, selector, safety lever, magazine catch, and support hardware—into one verified assembly, simplifying the building process.

Designed to ensure compatibility with standard lower receivers, this mil-spec lower parts kit meets rigorous quality control standards and is manufactured to military specifications. The components are crafted to withstand the demands of sustained fire, featuring hard-anodized and phosphate finishes that resist corrosion and wear, making them suitable for field deployment and high-round-count training.

Professional armorers, military units, and experienced builders trust Geissele for their AR-15 builds. The lightweight design (0.16 lbs) minimizes unnecessary weight while maintaining structural integrity, making this kit ideal for various rifle variants and lower receiver platforms across the AR platform family.