If Sig's name is on it, it'll be of excellent quality.
Another poster posted of external extractor. I have a few Sigs, all with eternal extractors. Not a single one has ever failed to do a darn thing except shoot with 100% reliability.
This is merely an opinion in the form of a guess: the most reliable handgun ever manufactured, including revolvers, is the Sig P229. The Sig P229 has an external extractor.
I have an S&W 1911, the model right after the Billboard model. I'd pit it against ANY 1911 regardless of cost. When S&W introduced its 1911 rendition with external extractor, many "experts" who were expert in some nebulous object other than handguns predicted extractor failures. It never happened!!!
Just a guess: 80% of cops' handguns have external extractors, and that's all Western countries' cops. If external extractors weren't reliable, cops wouldn't carry handguns with external extractors.
I've recently bought a Springfield Armory 1911 Loaded Model. It has an internal extractor. So far, it's been flawless. But I could never write that it's superior in any way to a 1911 with an external extractor.
Browning's 1911 prototype had external extractor.
Quality of gun more than extractor location will determine reliability.
If you like the Sig that has caught your eye, buy it.
I wish you best of luck.
My original GSR's extractor pin walked out on me. I had to send it back to the factory to have it replaced. The P series Sigs have no bearing on the Sig 1911. The P series was developed long before Sig got into the 1911 game. Also if you know your P series history you know that as soon as Cohen became the CEO they have also taken every possible step to cheapen the production of those pistols as well.
I am not sure if you know your 1911 history but the hate of the external extractor comes from Kimber not S&W. Kimber switched to the external extractor and it failed so bad they had to move back to the internal because their rep was so damaged and their CS could not handle the flow of issues. Guess who ran Kimber when that happened????
Also the 1911 as developed and produced under JMB direction had and internal extractor. It is a user serviceable and user replaceable part. It has served people well for over 100 years.
There were several other guns which lead to the the gun which we call the M1911. Some had internal extractors others had internal extractors but the pistol which was adopted and produced as the M1911 has and internal extractor.
The Model 1910 .45 ACP (12 produced (
http://www.coltautos.com/1910cigc.htm)) had an internal extractor.
The Model 1909 .45 ACP (23 produced (
http://www.coltautos.com/1909_cigc.htm)) had an external extractor.
The Model 1907 .45 ACP (207 produced (
http://www.coltautos.com/1907cigc.htm)) had an external extractor.
There is nothing wrong with the concept of an external extractor but they are not needed in a 1911. They are an solution looking for a problem. Companies like S&W & Sig use them for parts commonality and economy of scale not because they are better.
You do know that Sig P series guns used to have internal extractors but it was cheaper to put external extractors into milled stainless steel slides. If you don't know you history then you don't know your future. You seem not to know your past....
If you are going to try to teach people a history lesson you should probably get your facts straight.
It is great you like your S&W but it is a mid to low level 1911 when you compare it to the full spectrum of what is available. The same holds true for the Sig. They are decent mid level guns but they are nothing special.
The Sig of today is not the Sig of old. They still make pretty good guns but they can not justify the high cost when you look closely at the materials that are used and the products that are produced.