The HK45 is full-sized like the USP, but with ergonomic styling like the P2000. The HK45 adds front end grip serrations on the slide, a Picatinny rail, and an O-ring polygonal barrel for increased accuracy and more consistent lock-up of the slide and barrel during cycling. HK's unique internal mechanical recoil reduction system reduces recoil by as much as 30%, and the polymer frame with a textured ergonomic grip allows the pistol to sit lower into the web of the hand, contributing to recoil management and greater control of the weapon. This pistol features interchangeable backstraps, 3-dot sights, and an extended ambidextrous slide release. This HK45 model, Variant 7, has the double action law enforcement modification (LEM) trigger without a manual safety or decocking lever. The HK45 has been extensively tested and operationally proven, and it is well-suited for personal defense use.