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" features HK's LEM (Law Enforcement Modification) system" which combines the advantages of a cocked striker component (constant level of trigger pull from first to last round fired) with a double-action hammer system. The HK45 has been extensively tested and operationally proven" and it is well-suited for personal defense use.