Self loading pistol holster??
 

ok so i know it exists and a friend of mine deploying has seen it to, and hes currently looking to purchase one if he can but alas either im not searching the right thing or im blind. Yet i cannot find it, the closest thing i have found is the Russian Makarov Pistol Holster where you push down and it chambers a round is this the only one? or are there any other models out there??

any help would be great

As far as Im aware there was one made by a company Silvia or Sleeve or something like that that does exactly what your saying. It has a button that when depressed allowed an unchambered pistol to be chambered in holster.