A short story about a guy that used to work at my PD and carried a newer Sigma .40.
At that time, I had just bought a used Glock 23 and was qualifying with it for the first time. We were shooting up some old duty ammo that had been in the safe, even though we hadn't carried it for 5 or 6 years (Federal 180gr Hydra Shoks). We weren't using only the Hydra Shoks, it was being doled out a little at a time by the head instructor with our regular practice ammo. The guy carrying the Sigma and another Officer carrying one of the blued Value Line 3rd Gen .40 autos each had a case head separation. With both of them, they were able to take a pencil and get the case out of their chambers, the case heads were long gone and they were back in business with no other problems.
I, on the other hand, given Glock's less-than-optimum case head support, suffered a case head separation which blow the extractor and mag out of the gun. I had suffered the dreaded "Glock kB!"! Luckily, I was OK and a quick trip back to Glock fixed the gun right up. As it turned out, the ammo was the Hydra Shoks (I found my case head). Evidently, there was a BUNCH of Federal .40 ammo that had been recalled some years before for this problem, we hadn't heard about the recall and didn't know any better. However, I was impressed that the guys with the S&W autos didn't have any problems, while my Glock was down for the count.
I started doing some research and looking back over our past qualification records. The guy with the Sigma consistently qualified with no problems at all and NEVER had any malfunctions, unlike the majority of the guns our Officers carry (Glocks, other S&W autos, a couple of Sigs, heck, even a S&W M66 revolver). Most of those malfs were operator error (limp wristing, failure to fully insert mags, improper reloading for the revolver since an empty slipped under the extractor star). This research, even though it uses a very limited sample group (one lowly Sigma), impressed me. This Officer had the cheapest gun there, had the least problems and had a good, consistent score, even if it wasn't the best recorded. I shot his Sigma and was suitably impressed.
If His Majesty the Obama hasn't banned hi-cap mags by the time I'm ready, I'll be in the market for a high-cap 9mm before too long and a 9mm Sigma is DEFINATELY in the running! Never thought I would be intentionally looking at a cheap, "low-end" gun, but my experiences and everything I have read about the Sigma autos impresses me. And, they feel SO GOOD in the hand!
Bub