Geissele Ultra Duty Black Lower Parts Kit w/NO Grip 05-435B is a premium lower parts kit designed for AR-15 enthusiasts seeking enhanced durability and performance. This kit includes all the necessary internal components to complete or rebuild your lower receiver, featuring Geissele's proprietary designs. Key components are crafted from stainless steel, offering superior lifespan and resistance to rust, making them ideal for extreme conditions and heavy use. The kit also includes Geissele's Maritime Bolt Catch and Ambidextrous Super Configurable Safety, providing improved functionality and versatility. Material: Stainless steel components for enhanced durability Finish: Type 3 hardcoat anodized black for corrosion resistance Includes: Maritime Bolt Catch Ambidextrous Super Configurable Safety Ultra Precision Trigger Guard (machined from billet 7075-T6 aluminum) Checkered Takedown and Pivot Pins Textured Magazine Release Button All necessary springs and detents Compatibility: AR-15/M4/M16 platforms Part Number: 05-435B Geissele Automatics Geissele Ultra Duty Black Lower Parts Kit w/NO Grip 05-435B