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%" 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.