Geissele Ultra Duty Lower Parts Kit with Grip

Geissele Ultra Duty Lower Parts Kit

The Geissele Ultra Duty Lower Parts Kit provides everything you need to complete or rebuild your AR-15 lower receiver, engineered for operators who demand the best.

Superior Materials and Construction

Key components are manufactured from stainless steel, offering extended service life and exceptional corrosion resistance—critical advantages in extreme conditions or under sustained heavy use. The precision trigger guard is 5-axis machined from solid billet 7075-T6 aluminum and finished with Type-3 hardcoat anodize for durability and a refined appearance.

Premium Components

Maritime Bolt Catch — Features aggressive texturing and extended paddles for reliable operation and confident manipulation.

Ambidextrous Super Configurable Safety — Allows you to easily swap and exchange safety levers to suit your preference. Delivers satisfying, positive tactile feedback when transitioning between safe and fire positions.

Takedown Pins and Magazine Release — Finished with the same tank tread texturing as the bolt catch, creating a cohesive, professional appearance throughout your build.

What's Included

This kit includes all internal parts necessary for lower receiver completion, except the fire control group, which you'll source separately based on your trigger preference.

Geissele's attention to detail and commitment to quality makes this lower parts kit an excellent foundation for a rifle built to last.