I finally decided to buy my first ever, 1911 pistol. I wanted some thing that wouldn't break the bank, while allowing for me to customize the pistol to the way I like, when I choose to do so. I decided to get the Rock Island Mid Size, I wanted a 1911 pistol, that wasn't a full size, yet didn't have a barrel shooter then 4.00. I've seen that some people are calling this a commander, doesn't the commander models have a 4.25 barrel and if so, what's this verison called? Is thier any parts recommend to upgrade?