SWAT 3: Close Quarters Battle (also known as SWAT3 or SWAT3:CQB) is a tactical squad-based first-person shooter, developed by Sierra Northwest and published by Sierra Entertainment for Windows-based PCs on November 23, 1999. It is the seventh installment of the long-running Police Quest and SWAT series.
This is an weapons mod by Silent Scope, It replaces the standard Colt M1911A1 in secondary weapons with the H&K USP .45 from Rainbow Six Rouge Spear (minus gunshot sounds), The gun can be used in co-op and in deathmatch. This file is not by me and I do not take credit for it either, This file came from swat3reunited.com
To run the mod, drag the file to the swat 3 mods folder, open the swat 3 mods folder and check the file, This will activate it for use in game.