Geissele Ultra Duty Lower Parts Kit — AR-15 Black

The Geissele Ultra Duty Lower Parts Kit provides the internal components needed to complete or rebuild an AR-15 lower receiver. It was designed for demanding use and incorporates proprietary Geissele features, with key components machined and finished at Geissele’s facility in North Wales, PA. Several high-wear parts are made from stainless steel for improved service life and corrosion resistance. The kit also includes Geissele’s Ultra Precision Trigger Guard, machined from billet 7075-T6 aluminum and finished with Type-3 hardcoat anodize.

Key Specifications

• Designed for the AR-15 platform as a complete lower parts kit suitable for building or rebuilding a lower receiver.
• Includes the Maritime Bolt Catch with aggressive texturing and extended paddles for enhanced manipulation.
• Features the Ambidextrous Super Configurable Safety that allows secure swapping of safety levers and provides positive tactile engagement.
• Includes takedown pins and a mag release button finished with tank treading to match the kit’s aesthetic and tactile feel.
• Includes Geissele’s Ultra Precision Trigger Guard, 5-axis machined from billet 7075-T6 aluminum.
• The trigger guard is finished with Type-3 hardcoat anodize for wear resistance and a consistent appearance.
• Key wear components in the kit are made from stainless steel to improve longevity and corrosion resistance.
• Overall finish/style is listed as BLACK T6 ALUMINUM and configured as a lower parts kit.
• Manufactured and machined at Geissele’s facility in North Wales, PA.

The Ultra Duty LPK is built to deliver durable, user-focused controls and refined ergonomics for serious AR-15 builds. With stainless steel wear parts, an ambidextrous configurable safety, and a precision-machined 7075-T6 trigger guard finished in hardcoat anodize, this kit upgrades the long-term reliability and handling of a lower receiver while maintaining a professional, functional design.