Sure, but what makes "good" combat sites? 3 dot Novak? Others? I don't like 3 dot for example and prefer either black "notched" rear site with front post or XS sites:
XS Sight Systems - Handgun Sights - 24/7 Express
The above are the fastest shooting combat/SD sites there is, but are harder to master so some don't like them. Once you get used them/work with them, nothing gets you a site picture faster.
Sure, but what ever you buy will simply have some 3 dot Novak sits on them. Nothing wrong with that as they are a good blend of target/accuracy and combat site, but there are many choices out there, so I see any rush to get to sites, etc. But, as mentioned, above the plane jane GI model by SA or Colt, for a few $$$ more, you get better sites, etc.