Our AR15 Gen 2 Stripped Lower Receiver is the perfect base for your custom AR15 build. Machined to mil-spec dimensions, our lowers work with standard AR15 components and ensure the highest quality with a correct component interface.Gen 2 ImprovementsUpper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver.Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look.Includes:Stripped AR15 Lower Receiver, Gen 2Nylon tipped tensioning set screw