My wife isn't arthritic, but she's 65 now and never could rack the Kahrs. I bought her a P9, a P380, and then a G-19 gen. 3, and then a gen. 4 to no avail. After the G-43 came out I tried one of those and then bought a Blue Label one for her. Fortunately Glock had improved the connector by then and gotten the 5.5 pound or so trigger pull correct. She could cock the Glocks but they were too big. The G-43 was kind of like the Goldilocks "just right".
She hasn't shot it since the first range trip after I bought it, but it is ready at the head of her side of the bed. I haven't been to the range much in the last two years, but she's not interested in going with me. She's retired USAF and not unused to guns, but doesn't want to practice much.
There are replacement "toggles" for the rear back plate of the Kahrs. I favor teaching to use the support hand and placing the fingers over the slide with the thumb along the slide and simultaneous racking by holding the gun close to the chest and pushing the gun away while pulling the slide to the rear with the support hand. Avoid getting the fingers in the way of the ejection support and pull the support hand clear quickly to allow the slide to cleanly go forward... no "riding" the slide as that could lead to incomplete chambering, especially with Kahrs.
Another biggie is gripping the Kahr firmly. A loose or weak grip causes loss of momentum to the slide and incomplete chamberings... something you don't want in a possible fight to the death!
USAF Retired '88, NRA Life Member. Wife USAF Retired '96
Avatar: Wynn re-enlists his wife Desiree, circa 1988 Loring AFB, ME. 42nd BMW, Heavy (SAC) B-52G's
Frédéric Bastiat’s essay, The Law: http://mises.org/books/thelaw.pdf
Thomas Jefferson said
“A government big enough to give you everything you want, is strong enough to take everything you have.”
and
"Peace is that brief glorious moment in history when everybody stands around reloading".