[quote=@KatherinWinter]
[@Searat] Someone should have a trunk loaded with gear like the Winchesters have. I will have to put some thought into that. 
[/quote]

Argus' car is a Ford Police Interceptor (utility model)

Basically a Ford Explorer SUV tricked out for law enforcement use, and then his has been kitted out MIB style on top of that.

They pretty much by default have a secure armory or other equipment storage in the back
[url=https://tacticalcommandcabinets.com/wp-content/uploads/el-wc-gun-rack-.jpg]Example 1[/url]
[url=https://tacticalcommandcabinets.com/wp-content/uploads/Ploice-ford-explorer--e1424302915511.jpg]Example 2[/url]
It's safe to assume he's go something along those lines in the back, even if he doesn't always use it.