The HK45 Compact is well-suited for personal defense use"" and it has a DA/SA trigger system with a safety/decocking lever on the left side. The HK45C features a slim-line grip"" shorter barrel and slide than the standard HK45"" but it is otherwise functionally identical to the standard HK45. The HK45C can be fitted with a threaded barrel for use with a muzzle-mounted sound suppressor. The internal mechanical recoil reduction system reduces the recoil forces imparted to the weapon and shooter by as much as 30 percent "" improving shooter control during rapid firing and increasing component service life. This pistol features a MIL-STD 1913 Picatinny rail"" ambidextrous controls with dual slide releases"" enlarged magazine release"" low profile drift-adjustable night sights"" polygonal rifling for longer barrel life and increased accuracy"" and three magazines.