Hey guys new to the forum and new to the 1911 platform. I recently bought a SA mil-spec 1911 A-1 Loaded. What are the differences between my handgun and what i am reading about the "range officer", "TRP", "Commander" ( Colt?)? I have only put 100 rounds through it this far but absolutely love this gun! Full length guide rod, adjustable trigger, champfered edges, adjustable rear sight with night sights, what's not to like. Any info would be helpful as i am a sponge just soaking up as much as i can.