Chris, that second one is junk. I've had one. It is basically like the old upright racks that go in the back window of the truck, except it has a small cheap velcro strap that pulls the gun into the "U" shaped holders. It won't last long at all. Most of the good Law Enforcement racks will be the most secure, as they are designed for more of the type of use you will be doing (designed to hold during high speed and pursuit driving), and that sounds more better for your application.
P.S. I do not think any of them are waterproof.
Sorry buddy, had to say it.
