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Ruger Mk III
Ruger Mark III
Country of origin

United States

Manufacturer(s)

Sturm, Ruger & Co.

Year(s) designed

2003 - 2004

Production began

2004

Production ended

2016

Weapon type

Semi-automatic pistol

Caliber

.22 Long Rifle

Action

Blowback

Overall length

230mm (9.0in)

Barrel length

120mm (4.75in)

Weight

0.99kg (2.2lb)

Width

135mm (5.35in)

Magazine/Cylinder capacity

10

The Ruger Mark III is the third generation of Sturm, Ruger & Co.'s oldest line of pistols that effectively built the Ruger name. The MK III can trace its basic design all the way back to the Ruger Standard (designed in the 1950's) although various mechanisms and materials have been incorporated into the design of the MK III. The Mark III was discontinued in 2016 and has since been replaced by the Ruger Mark IV.

Design DetailsEdit

The MK III has remained, in essence, the same basic pistol that the original Standard had been. The same (but improved) blowback operating system is used along with the same 1:16 ratio rifling twist barrel and frame design. Many improvments to the Standard were made when the Ruger MK II was released, however the MK III has been developed to refine that design still further.

Major changes were made to the location of the magazine release and safety activation mechanisms to make the MK III more usable to a wider group of customers. The magazine release has been moved to behind the trigger guard to make it more accessible, while there was also a newly developed system to prevent the MK III from being fired without the magazine being inserted. The various safety mechanisms have been improved with the addition of an internal lock, which can be used to lock the MK III safe when a key is used. 

The MK III was also fitted with a new loaded chamber indicator, designed to let the shooter know if a round has been chambered and hence mean that the MK III would be ready to fire. This was also combined with a smooth contour ejection port, designed to ease the ejection of spent rounds as there was less chance of the cartridge cases from potentially being deflected back into the chamber, causing a jam. This was aided by the inclusion of a Weaver style tactical rail, to allow the fitting of custom scopes.

AmmunitionEdit

The MK III, like its predecessors the Standard and the MK II, fires the .22 Long Rifle cartridge, a popular target pistol calibre. The .22 Long Rifle rounds are fired from a 10 round magazine which slots into the underside of the grip.

VariantsEdit

The Ruger MK III is sold in four different formats, with the MK III being named differently for each specification of the MK III design.

MK III StandardEdit

The basic version of the MK III, featuring fixed iron sights and a choice of either a 120mm (4.75in) or 150mm (6.0in) barrel. All of the basic features (ie loaded chamber indicator, contoured ejector port etc.) are fitted to the MK III Standard.

MK III TargetEdit

The MK III Target was the second version of the MK III released, featuring a shaped grip and a 140mm (5.5in) barrel. Finished in blued or satin stainless steel, the MK III Target was also produced with basic iron sights (fixed front sight and adjustable rear sight) with a pre-fitted Weaver adapter for custom sights.

MK III HunterEdit

The MK III Hunter was a slightly more tuned version of the MK III Target, having been fitted with fibre optic sights and a fluted 175mm (6.9in) barrel. The Hunter also featured the same, specifically shaped, grip as the MK III Target.

MK III CompetitionEdit

The MK III Competition was the most tuned, factory specification version of the MK III, featuring a slab-sided 175mm (6.9in) barrel to reduce weight and a uniquely shaped grip to better fit the shooter's hand. The MK III Competition was also fitted with the same sights as the MK III Hunter along with a Weaver conversion kit to allow the mounting of custom/aftermarket sights.

UsageEdit

The MK III entered production in 2004, replacing the aging MK II originally produced in the 1980's. The MK III was intended to cement Ruger's reputation in the .22 Long Rifle pistol market, which it has successfully done. The four versions of the MK III that have been produced prompted Ruger to open a new line of 22/45 rimfire pistols also chambered in .22 Long Rifle. These versions, however, are designed to be used in other applications rather than just target shooting as the MK III has become popularly used. 

ResourcesEdit

http://en.wikipedia.org/wiki/Ruger_MK_III

http://en.wikipedia.org/wiki/File:Ruger_mkiii_bull.jpg - Image

http://www.ruger.com/products/markIIIStandard/features.html

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