I dunno, man. It's a SIG. I've shot those before, and the recoil is not that bad at all. One could fire it from any conceivable stance or grip position without injury. Now if it were an S&W 500, then yes. That would hurt.
Depends on wether it's 9mm Pansy or .45 ACP. Maybe you could get away with that low grip on a 9 mil, but a .45 SIG requires a bit more bracing. Though, any proper pistol should be in 10mm Auto, which will teach you to avoid low grip pretty quick.