Tier One Picatinny rails are precision manufactured on 5 axis CNC machinery, going from round bar stock to the finished item in one operation. By doing this, there is no accuracy loss due to re-setting for different operations. All rails are made from 7075T6 Aluminium, and are available for various firearms. Tier One Picatinny Rails exceed the manufacturing criteria set out for the metric upgrade to the Picatinny Rail in 2009, STANAG 4694 NATO. At present, our Picatinny Rails are available for the following action styles in 0-MOA or 20-MOA configurations.