Geissele Ultra Duty Lower Parts Kit — Black

The Geissele Ultra Duty Lower Parts Kit supplies the internal components necessary to complete or rebuild an AR-15 lower receiver. Designed for demanding use, the kit pairs stainless steel parts with Geissele proprietary components, such as the Maritime Bolt Catch and the Ambidextrous Super Configurable Safety. The Ultra Precision Trigger Guard is machined from billet 7075-T6 aluminum and finished with a Type-3 hardcoat anodize for long-term service. Components are finished and textured to provide a cohesive appearance and durable operation in varied environments.

Key Specifications

• Manufactured by Geissele Automatics.
• Product type: Ultra Duty Lower Parts Kit for AR-15 lower receivers.
• Finish is Type-3 hardcoat anodize (black).
• Includes Ultra Precision Trigger Guard, 5-axis machined from billet 7075-T6 aluminum.
• Key components are made from stainless steel for increased longevity and corrosion resistance.
• Includes the Maritime Bolt Catch with aggressive texturing and extended paddles.
• Includes the Ambidextrous Super Configurable Safety which allows lever swaps and provides positive tactile feedback.
• Takedown pins and magazine release button feature tank treading for a cohesive aesthetic and tactile control.
• Listed dimensions: 1.20 x 2.25 x 4.30 inches.
• Principal machining performed in North Wales, PA.

Whether you are assembling a duty-quality rifle or upgrading a personal build, the Ultra Duty LPK delivers durable, serviceable components and premium fit and finish. Its combination of stainless internal parts, ambidextrous controls, and a machined billet trigger guard provides a dependable foundation for modern AR-15 lower assemblies.