Blue as I do not care for stainless. I recognize the advantages I just don’t like em. The pistol has a myriad of internal specs and changes that I did not bother to post here as these guys for most part are not gun bunnies. They just like theirs to go bang! As a sponsored competitor I need just a bit more, hah! In my mind it will be a piece of art. Built to exactly what I wanted, no frills no pretty engraving just ruthlessly effective and reliable. All the work is on inside, hand fitted.