Re: Springfield GI .45
Far as I have found, Springfield Armory discontinued it. I think the reason the Mil-Spec is recommended more is because of the better sights. The GI model I'm pretty sure didn't come with a lowered & flared ejection port either. The RIA I had, had the lowered & flared port, but not the dot sights.
Samuel Adams once said, "among the natural rights of the colonists are these: first, a right to life, secondly to liberty, thirdly to property; together with the right to defend them in the best manner they can."