The Heckler & Koch USP is perhaps the most torture tested pistol in history. HK put the USP through extreme torture testing, including firing hundreds of thousands of rounds without a failure, dropping it in mud and water and snow, interchanging parts between worn out guns, and even sticking a bullet down the barrel and then shooting it out. Needless to say, the USP is a pistol that you can depend your life upon. The HK USP in .45 ACP holds 12 rounds for impressive firepower, and also has a tactical rail option for mounting lights and lasers. The 9mm holds 15 rounds and the .40 S&W holds 13 rounds. Compact versions of the USP are also available.