M-11 semi-auto and sub machine gun. Parts are steel with black oxide finish. This take-down pin has a spring loaded push button. When pushed, the three stainless steel keeper pins retract for easy pin removal. The pin is designed to replace the original two-piece front pin. Now you can quickly separate the upper and lower receivers without using an additional tool.
Exact pin diameter: .307″ – These pins are run to a nominal dimension.