It's easy with NO magazine, too. The slide lock is pushed up to lock the slide back on an empty mag. The magazine spring and follower push up the slide lock when there's no ammo left in the mag, by design.
There's a bunch of stuff covered in the manual and the FAQ's at Kahr.com
https://www.kahr.com/faq/
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".