An AR-15 stripped lower receiver is a component of the AR-15 rifle that serves as the foundation for the firearm. It is the serialized part of the firearm and considered the “firearm” itself from a legal standpoint in many countries, including the United States.A stripped lower receiver is essentially the lower portion of the AR-15 without any internal components. It typically consists of a solid piece of aluminum or polymer and includes the trigger group, magazine well, and selector markings. However, it does not include the upper receiver, barrel, stock, grip, or other components necessary to complete a functional rifle.

The stripped lower receiver allows firearm enthusiasts to build their own AR-15 or customize an existing rifle by adding the necessary components. It provides a platform for attaching various parts such as the upper receiver, barrel, bolt carrier group, handguard, stock, and grip.

When building or modifying an AR-15, it is important to familiarize yourself with the specific laws and regulations of your jurisdiction. Compliance with local laws, regulations, and restrictions is crucial when purchasing, assembling, or modifying firearms. It is advisable to consult with local authorities or seek guidance from professionals who are knowledgeable in firearm laws and regulations.