Just for information and alternatives, I had Mag-na-port port an Officers and a Commander for me. I was amazed with how soft and shootable it made both guns! Sight recovery was much, much faster. I did have to get taller rear sight for both as they were shooting about 5" low at 15 yds after the porting. I think I put the commander sight on the Officers and got a Gov't rear sight for the Commander. I mention this as it may be more difficult to get a ported barrel that works with the cone barrel system of the Commander size Kimber. Good luck. 44 Man