The Ruger MK II is a semiautomatic pistol designed and manufactured by Sturm, Ruger & Company. The pistol was very popular and more than 3 millions units have been manufactured and sold till date.The MK II was manufactured from 1982 to 2005. In 2005, the MK II was discontinued and replaced with the improved MK III. The Ruger MK II is chambered to use the .22 Long Rifle cartridge and is fairly accurate up to a distance of 70 meters.

The MK II has some design characteristics similar to the Japanese Nambu pistol. Bill Ruger before partnering with Sturm duplicated the Nambu pistol captured during the Second World War. However, he decided against marketing copies of the pistol and went ahead to design a new pistol that integrated some of features of the Japanese pistol.The MK II was available in several barrel lengths: 4, 5.5, 6.875 and 10 inches. A model called the “Government Model” was used by the US to train its solders and thus is more sought-after by gun collectors and enthusiasts. There is also another version called the “Red Eagle”. This was the version that was manufactured from 1949 to 1952.The Ruger MK II is used by Navy SEALs and pest control officers. The Israeli Mossad uses a suppressed version of the MK II.

The Ruger Security Six is a double-action revolver designed in 1971 and manufactured by Sturm, Ruger & Company. The Security Six was designed for use by law enforcement agencies and military. It was also marketed as a civilian self-defence weapon.The Security Six was Sturm, Ruger & Company’s first double action revolver. Its earlier designs were all single action revolvers similar to the Colt Peacemaker. The Security Six was manufacturing by using the investment casting technique which made the gun relatively less expensive to manufacture.

The Security Six enjoyed considerable popularity because of its robust construction and competitive pricing. It was also used by various law enforcement agencies and was also the standard issue revolver of a number of police departments. A large number of these revolvers were also exported to other countries.

The Security Six was the basis of two other variants:>> Service Six: The Service Six was a variant of the Security Six that was intended for use by law enforcement agencies. It was chambered for .357 Magnum rounds. However, some versions were also designed to use .38 Special and 9mm Luger rounds.>> Speed Six: The Speed Six was a variant with more compact round-butt grip. It was chambered for the .38 Smith & Wesson and came in 2.75, 4 or 6 inch barrels. It was exported to many countries such as India.