Thanks all for your input and welcome. Great site.Welcome tojo107,
Remove the magazine and keep it in a separate location.
Also good advice......How about typical cable thru the barrel with a GOOD padlock attached? I know the cable could eventually be cut but would they do this knowing you'd find out? Or, if you have a CCW permit, carry it? Sounds like the real safe way is as Post #8 explains....separate the slide from the body.