Milt Sparks is the only holster maker that had permission from Bruce Nelson to manufacture the "Summer Special" IWB holster. Rough side out leather with a reinforced mouth to help with re-holstering. The other 2 holster mentioned above are kydex versions but imho not as comfortable. The SS2 will break in within a week or so and the leather kinda conforms a bit to your hip. I have 3 milt sparks summer specials! 1 for my 1911, 1 for my Glock19 and 1 for my new S&W shield!
I also had no need for NV, so I went with the 512. As far as the submersion, if I'm 10 feet under water and still holding onto my rifle, something has gone terribly awry and I don't think an extra 23 feet is going to matter to me. YMMV
G21 Club #858