The SR-2 Udav (Удав, “Boa”) is Russian semi-automatic handgun developed by (TsNIITochMash, chambered for 9×21mm Gyurza cartridge. It was intended to replace older military sidearms like the Makarov PM. The gun features a squared-off trigger guard, ambidextrous safety lever on the slide as well as similar magazine release button and wide vertical front slide serrations.