Geissele Lpk Standard

The Geissele Lower Parts Kit Standard is the foundation every AR-15 builder needs to complete a reliable, duty-grade rifle platform. Designed by Geissele Automatics—a manufacturer trusted by military and law enforcement professionals—this LPK provides all essential internal components required to assemble a fully functional lower receiver. Whether you're building a patrol rifle, precision shooter, or tactical carbine, this kit eliminates the need to source individual parts, saving time and ensuring critical components meet professional standards.

The Geissele Lower Parts Kit Standard includes the fire control group, safety selector, magazine release catch, bolt catch assembly, and all necessary springs, pins, and detents required for functional operation. Each component is manufactured to tight tolerances and finished to resist corrosion and wear in demanding environments. The standard configuration delivers a clean, predictable trigger pull and reliable cycling—critical performance factors in professional and competitive applications where malfunction is not an option. Geissele's reputation in the industry stems from uncompromising attention to quality and fit; tolerances are held tight enough that parts integrate smoothly without binding or excess play.

This lower parts kit is compatible with any standard AR-15 lower receiver and integrates seamlessly with both mil-spec and commercial diameter buffer tubes. Builders installing the Geissele LPK Standard benefit from reduced assembly time and the confidence that comes with using components proven in military and law enforcement contexts. Installation requires basic gunsmithing knowledge and standard AR-15 assembly tools; detailed instructions are included. The compact 3 x 0.5 x 5.75-inch kit weighs just 0.19 lbs, making it ideal for shipping to your FFL or keeping in inventory during builds.