Geissele Automatics Ultra Duty AR-15 Lower Parts Kit - Black

The Geissele Automatics Ultra Duty Lower Parts Kit is a premium drop-in LPK designed to outfit any Mil-Spec AR-15 lower receiver with the high-quality internals Geissele is known for. Precision-built for durability and smooth function, this LPK delivers the small parts a builder needs to assemble a reliable semi-automatic lower.

The Ultra Duty LPK features key components machined from stainless steel, giving them far greater resistance to corrosion and rust than standard tool-steel parts while offering a longer service life in harsh conditions. The signature piece is the Ultra Precision Trigger Guard, 5-axis machined from a solid block of billet 7075-T6 aluminum and finished in Type 3 hardcoat anodized black to match the rest of the rifle.

This kit includes a Maritime Bolt Catch and bolt catch plunger, an Ambidextrous Super Configurable (ACS) Safety with positive tactile feedback, takedown and pivot pins, a magazine release button, and the Ultra Precision Trigger Guard. The ambidextrous safety makes the rifle equally usable by right- and left-handed shooters. This LPK ships without a pistol grip, letting the builder choose a grip that fits their preferred shooting style.

Whether you are building a duty-grade AR-15, a precision carbine, or a home-defense rifle, the Geissele Ultra Duty LPK provides the small-parts foundation a quality build demands. It is a direct-fit replacement for the standard parts in any Mil-Spec AR-15 lower.