AR-15 Lower Receiver Parts and Kits

AR-15 Lower Receiver Parts and Kits

Shop AR-15 lower parts and components at Moriarti Armaments for completing, repairing, or upgrading your AR-15 lower receiver. Browse AR-15 lower parts kits (LPK) and individual components including triggers, hammers, selectors, takedown and pivot pins, bolt catches, magazine catches, springs, detents, grips, and related hardware. Whether you need a complete AR-15 LPK or a single replacement lower component, our selection makes it easy to find compatible parts for Mil-Spec AR-15 lower receivers. Choose quality components for new projects, replacement needs, or custom configurations while comparing available materials, finishes, and component options from Moriarti and other trusted manufacturers.

What parts are included in an AR-15 lower parts kit?

A typical AR-15 lower parts kit (LPK) includes the fire-control components and small hardware used in a lower receiver, such as the trigger, hammer, disconnector, safety selector, bolt catch, magazine catch, takedown and pivot pins, springs, and detents. Contents vary by manufacturer: some kits include a pistol grip and trigger group, while others omit these components so they can be selected separately. Always review the individual kit's parts list before purchasing.