They stopped making them because they SUCKED.
They resolved the patent issues and continued to make them.
However, S&W removed the “Sigma” name from the branding and just used letters and numbers. I know a few people that bought the re-washed Sigmas under the letters/numbers and they were sorely disappointed.
I can’t say that I’m “sorely disappointed”. I got what I paid for. Doubt I’d ever carry it, but police use it, maybe because mine has never failed to fire. I have it stashed where I can reach it quickly.
It was that or a this: http://www.hi-pointfirearms.com/handguns/hi_point_handguns.html (You know, the gun that looks like a Black & Decker cordless drill? :^)
I count the word "Sigma" used four times.
http://www.smith-wesson.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=11101&storeId=10001&productId=14733&langId=-1&parent_category_rn=15713&isFirearm=Y