Here is a look at installing the Knight's Armament URX 3.1 rail. To do this successfully, you will need the following tools and materials:

• Securely mounted vise
• Upper receiver vise block
• Loctite 242 (or similar thread lock)
• Knight's URX barrel nut wrench
• Torque wrench

They key to installing this rail correctly is having the right tools and taking your time. There are 4 main steps to installing the rail: