AR15 Armorer’s Master Kit™All The Tools Needed to Build or Customize an AR15. This kit of Master Grade Tools and how to information equips you to confidently tackle everything from building your own gun from the ground up to customizing or modifying an existing gun. With better tolerances, materials and expanded capability, every tool is carefully designed to make each job as simple and easy to execute as possible. Housed in a professional tool case and equipped with step by