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50- or 100-round magazine The M100 is a blowback -operated semi-automatic rifle chambered in .22 LR , manufactured by Calico Light Weapons Systems in Elgin, Oregon , United States. It was originally designed and released in the 1980s to be of use by law enforcement and the military.
Introduced in 1962, the High Standard D-100 and the later D-101 and DM-101 are hammerless, double-action derringers with half-trigger-guards and break actions. These double-barrel derringers were chambered for .22 Long Rifle and .22 Magnum and were available in blued, nickel, silver, and gold plated finishes. They were discontinued in 1984.
The .22 long rifle, also known as the .22 LR or 5.7×15mmR, [4] [5] is a long-established variety of .22 caliber rimfire ammunition originating from the United States. It is used in a wide range of firearms including rifles , pistols , revolvers , and submachine guns .
The American-180 is a submachine gun developed in the 1960s which fires the .22 Long Rifle or .22 ILARCO cartridges from a pan magazine. The concept began with the Casull Model 290 that used a flat pan magazine similar to designs widely used prior to World War II. Only 87 Casull M290s were built, as the weapon was expensive to manufacture. [5]
.22 caliber, or 5.6 mm, refers to a common firearms bore diameter of 0.22 inch (5.6 mm) in both rimfire and centerfire cartridges. Cartridges in this caliber include the very widely used .22 Long Rifle and .223 Remington/5.56×45mm NATO. .22 inch is also a popular air gun pellet caliber, second only to the ubiquitous .177 caliber.
The original model (D-100), was produced from 1962 to 1967 in 22 LR only in blued finish. In 1969 the D-101 (.22 LR) and DM-101 (.22 Magnum) upgraded models were released in blued, nickel, silver, and gold plated finishes.
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Using the same 40 gr (2.6 g) outside-lubricated bullet later adapted for the much more common .22 long rifle, [2] the extra long was loaded with 6 gr (389 mg) of black powder. [2] Originally, it slightly outperformed the .22 LR, but was "not noted for great accuracy", [2] while later smokeless loads achieved about the same muzzle velocity as ...