Sling shot will work every time on any Kahr if it is executed properly. Slide release is recommended because many partially due to the compact size and strong springs don't execute a proper sling shot.
It needs full travel and no riding the slide forward to work in some. Others especially having been shot some chamber with ease even riding the slide.
I had no issues with my PM45 and the sling shot right out of the box.
I'm using a Garrett Silent Thunder for IWB. Took me a bit to warm up to it but I wear it almost exclusively these days.
For OWB I really like Mernickle, they ride high and tight. Mine is the PS6 model. Good people at both places.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."