Mk22

The MK.22 "Hush Puppy" is a tranquilizer gun given to Snake during the Virtuous Mission and Operation Snake Eater.



Overview
During the Vietnam conflict, the US navy sponsored development of the silenced pistol for use by its SEAL teams.

Nicknamed the hush-puppy because of its intended function of killing enemy watch dogs, this modified version of the steel framed Smith & Wesson model 39 pistol was put to other clandestine used as well. Called the mark 22, mod. O pistol by the navy, the hush puppy had a slide lock to keep the mechanism closed and silent while firing. It fired a special green tipped 9mm parabellum projectile weighting 10.2 grams (158 grains that yielded a muzzle velocity of 274m.p.s. (900 f.p.s), below the speed of sound. Use of standard supersonic ammunition quickly degrades the effectiveness of the silencer insert. With subsonic ammunition, an insert is good for about 30 rounds; with standard velocity cartridges the insert may have to be replaced after six shots. Official navy designation for the silencer is mark 3, mod.0 . Ammunition and replacement silencer parts are supplied as accessory kit MK26, Mod.0. Each accessory kit includes 24 9mm pistol cartridges MK144, mod.0 and one silencer tube insert.

All the work on the model 39 hush-puppy was carried out by Smith & Wesson before the end of 1968. Subsequently, Smith & Wesson provided two prototype 13-shot pistols made from stainless steel. These weapons were improved to overcome problems such as extractor breakages, which had been experienced with the model 39. This modified pistol in a slightly different form as later commercially marketed as the model 59 Smith & Wesson 9mm parabellum pistol.

The Mk.22 used by Naked Snake during the Virtuous Mission utilized an even more specialized ordnance in the form of 9mm tranquilizer rounds capable of putting their target to sleep for a short time. In terms of operation, magazine capacity and performance, the Mk.22 represented by FOX is akin to its real-life counterpart and captures the ideal of a "perfect pistol for a sneaking mission."

Like the M1911A1, the Mk.22 was used in conjunction with a knife for CQC.

This weapon also appears in Metal Gear Solid: Portable Ops and Metal GEar Solid Peace Walker. .

Technical Specifications
WOX-13A 9mm pistol

Overall length - 8½”

Total weight (without magazine) - 26oz

WOX-1A silencer

Overall length - 5”

Total weight - 8oz

WOX-13A 9mm pistol and WOX-1A silencer

Combination overall length - 12¾"

Total weight (without magazine) - 34oz

Location
The Mk.22 can be found in Snake's backpack at the start of the Virtuous Mission. While Snake was not issued a Mk.22 during Operation Snake Eater, EVA gave one to Snake after he met up with her at Rassvet; saying (to Snake) "You had this with you, didn't you?" Given the unique nature of the ordnance it fires (non-lethal tranquilizers), this Mk.22 can be assumed to be the scavenged weapon from the Virtuous Mission.