The standard-size OZ9 was the first The ZEV OZ9 Duty, features the same functionality and modularity of theOZ9 in a configuration optimized for durability without compromising on performance. Built with ZEV's windowless Duty slide, PRO match barrel, and PRO Curved Face Trigger, the OZ9 Duty is tailored to meet the stringent requirements of the discerning professional user. designed and built entirely by the experts at ZEV, and now, say hello to the ZEV OZ9 Duty Compact Semi-Auto Pistol. This scaled-down version has all the great features of the original, but in an ultraconcealable size. Created for ultimate balance and control, this gun delivers less felt recoil and muzzle flip for faster follow-up shots. The PVD-coated, patent pending Steel Receiver runs the length of the entire pistol allowing the locking block to be fully integrated.