Well, if you ever get nostalgic for mowing come on down, we've got five acres and the grass grows fast in Florida. The horses keep about two and a half acres mowed so it's not too bad. You can even use our lawnmower. ;D
This may help. check with them to see if it fits with the pistol grip. http://www.tanksrifleshop.com/trs/index.php?app=ccp0&ns=prodshow&ref=widerelease&sid=c816xt1lxan8jah6z285164shx3l8tv9
The current assaults on our 2A rights are bringing the voices of the pro 2A majority of Americans to the national stage. Many politicians, I think, are beginning to see the ends of their careers when adopting an anti 2A platform. And all they really care about is their cushy jobs. Thank you for shouting loudly and clearly.
I just read on another forum of a shooter using GSG 1911-22 magazines sucessfully in his Kimber rimfire. So by extrapolation I'd guess that Kimber magazines will work in your SIG.