Armaspec Takedown Pivot Pins Titanum. 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. Specifications for Armaspec Takedown Pivot Pins: Manufacturer: Armaspec Country of Origin: USA Features of Armaspec Takedown Pivot Pins Fits for AR15/M16/M4 Package Contents: Armaspec Takedown Pivot Pins What firearm models does the manufacturer say Armaspec Takedown Pivot Pins is compatible with? The manufacturer says that Armaspec Takedown Pivot Pins is compatible with AR-15Armaspec ARM145-TI: Takedown Pivot Pins Titanum