I really missed having a 45 so I knew what I had to do. It is the SF, but without the ambi mag release from the factory. I prefer it this way as too many people were having issues with the ambi mag release falling out. Can't test it out until this weekend. Now it is a waiting game. The grip feels absolutely great! It just seems to fit my hand perfectly. I can't wait to see how I shoot it. I picked up some spare magazines as well as a double mag pouch. I'll be ordering a supertuck for it the end of this week. I hope to make this my primary carry with the 26 being what I grab when I don't want the full size beast.