Mean Arms AR-15 Titanium Takedown and Pivot Pin Set Black. The Pivot Pin has a unique feature with two through holes for easier assembly and disassembly. These holes make installation and removal very simple and quick. No more fighting with the detent to install or remove the Pivot Pin. Specifications for Mean Arms AR-15 Titanium Takedown and Pivot Pin Set: Manufacturer: Mean Arms Finish: TiCN Color: Silver Black Fabric/Material: Grade 5 6AL-4V Titanium Additional Features: Includes 1x Enhanced Takedown Pin and 1x Enhanced Pivot Pin Gun Model: M4 AR-15 Package Contents: Mean Arms AR-15 Titanium Takedown and Pivot Pin Set 1x Enhanced Takedown Pin 1x Enhanced Pivot Pin What firearm models does the manufacturer say Mean Arms AR-15 Titanium Takedown and Pivot Pin Set is compatible with? The manufacturer says that Mean Arms AR-15 Titanium Takedown and Pivot Pin Set is compatible with AR-15 M4Mean Arms 2100869: AR-15 Titanium Takedown and Pivot Pin Set Black