Our AR-70 Firing Pins are precision machined using our CNC Swiss turning centers. The Titanium AR 70 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. AR70 Pin Length 3.666 nose diameter 0.055. Made in the USA!!