The HK45T (Tactical) is a specialized variant of the HK45 designed for tactical applications, chambered in .45 ACP with a 10-round magazine capacity. It features a 5.2" cold hammer-forged barrel with polygonal rifling, threaded for suppressor use (metric 16x1 left-hand thread). The overall length is 8.5", with an unloaded weight of 31.2 oz. The pistol incorporates HK's O-ring barrel system for enhanced accuracy and includes raised tritium night sights that allow use with mounted suppressors. Notable features include the modular grip backstrap system, ambidextrous controls with extended bilateral slide releases and magazine release, and a MIL-STD-1913 Picatinny rail for accessories. The HK45T comes in multiple trigger configurations including DA/SA and LEM variants. It features HK's proprietary mechanical recoil reduction system, hostile environment finish, and the same durability features as the standard HK45. Additional tactical features include extended magazine wells for quick reloads, enhanced grip texturing, and compatibility with various tactical accessories. The pistol maintains HK's reputation for exceptional reliability under adverse conditions, making it popular among military and law enforcement units.