A little background. I have been a huge Sig fan since I picked up my first P226 (West Germany). I bought a M400 when they were first released because I am comfortable with the DI gas system. Comfortable meaning that I have spare parts and could repair it on the fly if necessary. So I was in the LGS and surprisingly they had a P516 10" and P716 12", both with the SB15 Stabilizing Brace. I could not believe the quality and the feel of these pistols. Before someone responds and says buy all three, I can only afford one.
PM400 11" SWAT PSB
PRO: I like that it is DI and 11"
CON: I don't like the rail and the FSB
P516 10" PSB
PRO: I like the rail
CON: 10" and it is Piston (Not that piston is a bad gas system, just that I would need to send to Sig for repair.)
P716 12" PSB
I like 7.62x51mm, but I can not imagine the noise, muzzle flash, and recoil.
There is very little info and almost no reviews out there since they are fairly new, so has anyone had some experience they would like to share?