The RPP-5 is automatic pistol made by Doctech. RPP-5 carries 12 rounds per magazine it is first carried by Jackal, but later replaced by the Colt Single Action Army after it jammed. It's American equivalent is the M10 pistol.
RPP-5S is a tranquilizer version of RPP-5. It is found in the Doctech's Holding Facility in Tselinoyarsk during Operation Black Dragon.