Many consider the H&K P7 to be the finest handgun ever offered by the company, or even of any company. YouTuber LifeSizePotato recently posted a picture of his P7M13 to Imgur, an image hosting/social media site:

The Heckler and Koch P7 is an unusual gas-retarded blowback handgun, which utilizes pressure from the expanding propellant gases to retard the rearward movement of the slide until the pressure drops. The P7M13 is the double-stack variant of the single-stack H&K P7, and was offered to the US Army during the M9 pistol trials.