Because it was a jam-o-matic. I had one, couldn't get it to run. Different ammo mfgs, different bullet weights, different mags, a trip back to the mother ship for a new extractor. Still wouldn't run reliably. Extracted cases would end up jammed BACKWARDS in the ejection port. Mine was an Argentine made specimen. Sold it off when Covid hit and people were buying everything in sight.
I wish I'd've known you had one to sell. I have one, but I'd've bought it, flat out, as long as it wasn't banged up.
Mine initially would reliably malfunction -- failure to feed, stove pipe, failure to extract -- routinely. The problem with the pistol was, the distance between the extractor claw (for wont of a better word) and the bolt face was too shallow. If you ever inspected the cases that did manage to eject properly, they almost always had an extractor score mark on the outside edge of the case rim, as if the extractor had used the edge of the rim to pull the empty case out. And *that* is exactly what was happening, when the pistol did function properly.
The solution was to send it back to SA (they paid for shipping both ways, but I didn't request reimbursement for sending it) and have them machine the bolt face and increase the distance to the proper specification. After they did mine, it would eat .45 ACP cartridges, like a 1911 is supposed to do.
I can't understand why that trivial manufacturing flaw evidently repeatedly passed inspection. It's like production samples were never test fired, and a new recoil system had to be implemented in the design for such an out-of-specification shortened slide. It very effectively sullied the reputation of the pistol. (Actually, I think *that* is why it was dropped; I just wanted to hear confirmation.)
They're fantastic pistols. Perfect for every-day-carry. You really need to use a light bullet, though, for such a short-barreled pistol. For example:
https://www.lehighdefense.com/all/451-45-acp-xtreme-defense-120gr-bullet I suspect you might be able to reach a thousand fps with a fast-burning powder.