Originally developed as part of the U.S. military's Joint Combat Pistol program in 2005-6, the HK45 Tactical model is the threaded barrel version of the HK45. It comes standard with a threaded barrel and adjustable Truglo high-profile sights, which are suitable for use with or without suppressors. The sights are made exclusively for HK. The full-size HK45 Tactical (HK45T) features an ergonomic grip design with changeable backstraps and molded finger grooves that naturally position the user's hand for optimal shooting. All HK45 pistol series models- compact, full-size, and Tactical- are manufactured at HK's American facility in Columbus, Georgia, using American and German components.