Geissele's Ultra Duty Lower Parts Kit was designed to accommodate the most discerning shooters, and comes with all the necessary parts needed to rebuild or complete your lower receiver. Each component of this kit features proprietary Geissele designs, and is meticulously machined from top-quality stainless steel to provide a long service life of heavy use.

This kit includes:

• Maritime Bolt Catch
• Ambidextrous Super Configurable Safety
• Takedown pins
• Mag release button
• Ultra Precision Trigger Guard