Mr. dodgeing230grainers, There no doubt will be members who will disagree with me, however, I would not recomend the 3 1/16" GP100. I owned one and traded it away. For CCW it is quite bulky and heavy. While it is a 6 shot it has only 15/16" more sight radius than a 2 1/4" SP101. The SP101 conceals much better, my opinion. If the gun is going to stay in your home and not be carried, then purchase the 4" GP100. My 3 1/16" GP was no more accurate at 15 to 20 yards than my 2 1/4" SP. I'm not trying to talk you out of buying the 3" just giving you my views. IWB holsters don't seem to be as readily available for the 3" gun also. I carry my 2" SP and love it. P.T.