Heizer Defense makers of the single shot PS1 pocket shotgun and the single shot pocket pistol chambered in 7.62x39mm released their first semi-auto pistol at the 2016 SHOW Shot. Their new PKO-45 semi-automatic pistol is made in the USA and chambered in .45ACP and is marketed towards the conceal carry market. It’s pretty thin and flat at just .8 inches wide. All the controls are flat and very flush with the pistol making it very snag free. Heizer Defense actually claims their new PKO-45 pistol is the slimmest semi-auto on the market.
The Heizer Defense PKO-45 is made out of USA aerospace grade stainless steel with a titanium version in the works too, the model I saw at the SHOT Show appeared to have some plastic parts as well. It features a barrel under the guide rod configuration for less recoil. A 9mm and 380 auto model is in the works, the .45ACP variant carries 5 plus one with the flush magazine and 7 plus one with the extended magazine. It felt good in my hand and it pointed pretty well. The only downside I felt was the weight, their all stainless steel model weights in at a hefty 28 ounces, in comparison the Ruger LCP weights in at 9.6 ounces. Pricing is TBD, check out heizerdefense.com for more info.