I’m just beginning to learn about 2011s. My current carry gun is a G19 with an RMR. I love the extra capacity for training classes and drills that require 12-15 rounds as most training classes these days seem to be gear toward poly pistol owners. However my first true love is the 1911. I would like to build a double stack commander now that companies like Nighthawk and Chambers have worked out the RMR mount for a 1911 slide. Are most companies using a Government length slide and cutting it back to commander length and running a bull barrel or is there a commander length 2011 frame available that I’m just not finding available online? Is there a shorter frame available as well for carry that would use a mag in the 15 round size?