The AR–15 is a lightweight, air–cooled, magazine–fed, auto-loading, centerfire rifle.

This article contains a comprehensive collection of files are many CAD files for the construction of the AR–15 upper and lower receivers. Including highly detailed blueprints as well as multiple high–quality photos of the construction process and final product and easy to follow written instructions.

These blueprints will enable the amateur gunsmith to construct their own AR–15 receiver from scratch.