Good evening here Jaybethel, if you are competent with detail stripping your new 1911, I can unequivacably recommend the Smith and Alexander mag well, if you can remove your mainspring housing, you can add a magwell yourself. It will look nice and fit. If you own a Para, it will have to be fitted, Para's fault, not any body elses. But you bought a SIG,

I have not fitted one but my guess is their dimensions are right on the money. I admit I am prejudiced

as Alan Smith invented the mainspring housing magwell, and is my friend, ( even if he is from New York) great guy and still lives in my little suburb here in Texas. He also invented the ambidextrous mag release for 1911's, and has a fine beaver tail grip safety.
Now I have used the Wilson under the grip magwells and they're not bad, you or someone will have to relieve the grip on the underside for the magwell hooks to clear, if you do it yourself it's really inexpensive, if you pay someone to do it, might as well buy a mainspring housing magwell.
A note of caution, and this may not be true now, I bought a Wilson 2 piece main spring housing magwell, and it would only work with his magazines, I had to relieve it quite a bit for rogers, or mecgar, etc... to seat. As I said, this may not be true now, as i did that 15 years ago.
