The AMT AutoMag II is a semiautomatic handgun chambered in
.22 WMR, that was manufactured by
Arcadia Machine and Tool
Arcadia Machine & Tool, commonly abbreviated to AMT, was a firearms manufacturer from Irwindale, California. The company produced several weapons, primarily clones of existing firearms, but made from stainless steel rather than the standard steel ...
from 1987 until 1999,
and was manufactured by High Standard until their closure in 2018.
Design
There were a number of engineering challenges to overcome in designing an autoloading .22 WMR handgun such as extraction problems. The extraction problems stem from the fact that the slow burning rifle powder of the
.22 WMR cartridge develops a late peak pressure. This can cause the case mouth to expand and jam in the chamber when fired from a handgun. AMT overcame this issue by drilling 18 holes at 90 degrees to the chamber. A sleeve was then welded over the chamber; providing a tiny amount of clearance for the excess gas to escape from the first set of holes on back to the second set, thereby relieving the pressure enough to prevent the case from sticking.
The stainless steel slide has a large cutout over the barrel, similar to the
Beretta M9
The Beretta M9, officially the Pistol, Semiautomatic, 9mm, M9, is the designation for the Beretta 92FS semi-automatic pistol used by the United States Armed Forces. The M9 was adopted by the United States military as their service pistol in 1 ...
, to facilitate better cooling and ejection of the spent brass casing (more likely it is simply to reduce the moving mass of the slide to allow for the blow-back operation). The stainless steel construction throughout makes rust a non-issue.
See also
*
AMT AutoMag III
*
AMT AutoMag IV
*
AMT AutoMag V
*
Kel-Tec PMR-30: .22 magnum semiauto pistol
https://www.smith-wesson.com/product/mp-22-mag
References
External links
High Standard Firearms
{{DEFAULTSORT:AutoMag 2, AMT
AMT semi-automatic pistols
Semi-auto magnum pistols
Semi-automatic pistols of the United States
.22 Winchester Magnum firearms