KNS Precision Enhanced AR15/M16 .250 Diameter Push Button Take Down Pin Black PBTD250-EN. 250 diameter take-down pin has a spring loaded push button. When pushed the stainless steel keeper pins retract for easy pin removal. The pin is designed to eliminate wear in and around the hole caused by pins with spring loaded balls. The steel has a black oxide finish. The button also has a drilled cross hole which allows for the installation of a seal wire to prevent tampering with the guns internals. This Enhanced version now has an end cap to ease in pin removal and installation. It also prevents any debris from entering the internal parts of the pin. Specifications for KNS Precision Enhanced AR15/M16 .250 Diameter Push Button Take Down Pin: Manufacturer: KNS Precision Finish: Black Oxide Condition: New Trigger Pin Size: 0.25 Color: Black Country of Origin: USA Package Contents: KNS Precision Enhanced AR15/M16 .250 Diameter Push Button Take Down Pin KNS Precision PBTD250-EN: Enhanced AR15/M16 .250 Diameter Push Button Take Down Pin Black