I'll use it as my daily concealed carry. No, most military organizations us a 9MM now but a few use a 40 or 45. I got the 45 for one shot stopping power and it's very compact.
I have all kind of weapons both pistols and rifles. I've got a few Sigs, a Smith & Wesson, Bushmaster, Glock, one Colt and a large frame Taurus 9MM.
The Sigs (P229 Iraqi Freedom Limited Edition(40) and P220 (45)) are my favorites by far.