Armaspec Takedown Pins, Black ARM146-BLK The Armaspec Superlight aluminum Takedown/Pivot Pins for AR15/M16/M4 . These enhanced takedown/pivot pins come with several enhancements for easy installation and operation. A convex head so it can be tapped from any angle. An extended concave tip for easy removal using any flat or pointed object including a bullet tip and an EZ-Set hole for detent installation. Pat. Pend.