Anti-walk Trigger/Hammer Pins - The torque spec on the screw is 11 inch-pounds maximum; 8 inch-pounds of torque are recommended. - Pin Diameter: .154 - Note: The external width of AR receivers varies in the trigger/hammer pin area depending on the manufacturer. If the pins are too long for your receiver you may shorten the pins a small amount by carefully filing material evenly from both ends of the pins. However this is not required. Longer pins will not affect the function or performance of the rifle.