AR 15 Lower Parts | AR15 Lower Receiver Parts, Buffer Tubes, Triggers & Magazines

AR 15 Lower Parts

Shop AR-15 lower parts and components at Moriarti Armaments for completing, upgrading, or maintaining your AR platform. Browse AR-15 lower parts kits (LPK), magazines, stocks, pistol grips, triggers, buffer tubes, buffers, buffer springs, selectors, takedown pins, magazine catches, bolt catches, and other lower receiver components. Whether you're looking for a complete AR-15 LPK, replacement hardware, furniture, or an upgraded recoil system, this category brings essential lower components together in one place. Explore Mil-Spec AR-15 parts in multiple configurations, materials, finishes, and styles from Moriarti and other trusted manufacturers. Use the individual subcategories to quickly find the lower receiver parts and accessories needed for your specific AR-15 configuration.

What parts are needed for a complete AR-15 lower?

A complete AR-15 lower generally includes the lower receiver, lower parts kit, trigger or fire-control components, pistol grip, buffer tube, buffer, buffer spring, and stock or other appropriate rear configuration. The lower also works with a compatible AR-15 magazine. Exact components vary by configuration, and some lower parts kits exclude the trigger, grip, or buffer system, so always check what is included before purchasing.