This is a pristine example of a AMT AutoMag II. It is a semiautomatic handgun chambered in .22 WMR, that was manufactured by Arcadia Machine and Tool from 1987 until 1998 in Irwindale, CA. The stainless steel slide has a large cutout over the barrel, similar to the Beretta M9, 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. From available research this more desirable example was made by AMT at their Irwindale, CA original facility. $1,000Trade value same.   Type Semi-automatic pistol Place of origin United States Manufacturer Arcadia Machine and Tool Produced 1987-1998 Mass 32 oz (910 g)Barrel length 6 in (150 mm),  Cartridge .22 Winchester Magnum Rimfire Barrel 6 grooves, right hand twist Feed system 9 round detachable magazine Sights White outline Millet adjustable sights