Battle Arms Development BAD-EPS-Ti-B, Titanium Enhanced Pin Set, Black Finish BAD-EPS-Ti-B Battle Arms Development Enhanced Pin Set (BAD-EPS-Ti) for the AR15 / M16 / M4 style rifles. The set consists of the Enhanced Takedown Pin - Titanium (BAD-ETP-Ti) and Enhanced Pivot Pin - Titanium (BAD-EPP-Ti). Precision CNC machined from Grade 5 Titanium Bars, the BAD-ETP-Ti & BAD-EPP-Ti are in its natural machined titanium finish. 50 percent lighter than Mil-Spec pin set!