Our AR-15 Firing Pins are precision machined using our CNC Swiss turning centers. The Titanium AR 15 Firing Pin is made from Grade 6 Titanium which has an Ultimate Tensile Strength of 140,000 psi. Titanium is 40% lighter than your standard grade of steels thus giving you a faster lock time. Titanium is also Corrosion and High Temperature Resistant to help eliminate galling, fretting and seizing. All AR 15 Titanium Pins are shipped with material certification sheets. Pin length is 3.278 inches.