HK 45 TacticalConstructed for the US military based on the proven USP . 45, our new HK45 and HK45 Compact models combine tried and tested characteristics with new features. The o ring mounted at the front of the barrel minimizes any barrel play. Our patented recoil system increases accuracy and service life even under the toughest conditions. Interchangeable backstrap inserts and ambidextrous operating controls ensure an ergonomic and flexible design. The familiar