About the Handgun:
The success of HKs G3 Automatic Rifle led to the desire for the company to produce handguns. An offshoot of the G3 program was to produce a handgun that featured the roller locking system that was so successful in the G3. The P9 was that pistol. The P9S was a double-action derivative of the P9, easily identified by the trigger guard and the position of the trigger lever. The trigger guard was altered in the 1970s to suit the fashionable two-handed grip, acquiring a reverse curve in the front edge.
About the Manufacturer:
In 1949 two ex-Mauser engineers, Edmond Heckler and Theodor Koch, started a company in Germany to make machine parts. In 1956 the company participated in the German Government's tender for a new infantry rifle. With its development of the G3 assault rifle Heckler & Koch won this tender, and in 1959 the G3 was officially declared as the new standard assault rifle of the German Bundeswehr. In 1970 they began the production of a new machine pistol, the MP5 which gained a great reputation worldwide. In 1990 however, a major contract for the revolutionary G-11 caseless-cartridge rifle failed to materialize and HK encountered financial difficulties. In 1991 the company was sold to become a part of the large British defense group British Aerospace/Royal Ordnance. During the 1990s HK had good success, producing the P8 pistol and the G36 assault rifle. In 2002
British Aerospace/Royal Ordnance restructured its business and sold HK to private investors. Since then the company has continued with good success in commercial, defense and law enforcement markets.
About the Cartridge:
This cartridge was developed by John Browning and was adopted by the United States Ordnance Department along with the Colt-Browning automatic pistol in 1911. It has also been made the official military handgun chambering by several other governments, notably Argentina, Mexico and Norway. The 45 Automatic is the most powerful military handgun cartridge in use today. This is a heavy and powerful sub-sonic round. Although its muzzle energy can exceed 400 ft-lbs, its velocity and bullet weight creates a steep trajectory curve that limits its effective range to self-defense distances.