Rick,

I like these:



You can get them here:

The small fits a J-frame snubby or a baby Glock & the large fits your large frame autos like a 1911 or Glock 17 plus mags or light. They are low profile to fit anywhere & use a steel cable to secure around a seat post or whatever.

I like that you get them keyed alike & can take them from one vehicle to another plus they're TSA approved. I've got a large & small myself.