My beloved wife has been wanting a 1911 to carry for a long time. So, I've finally gotten around to looking into them. Oh man, what a mess. Flat vs arched mainspring housing, internal vs external extractor, full length guide rod vs whatever the alternative is etc... All defended by ardent fanbois on both sides.
So what do I actually need to know? Which of these differences are significant, and which are tradition vs new stuff with no real performance issues?
Simple.
1. THe original M1911 adopted by the U.S. Ordnance Department had a flat mainspring housing. Some of the old cavalry types who were still accustomed to the Model 1873 SAA complained that the new pistol didn't shoot to the same point of aim because it felt "funny" in the hand. The arched mainspring housing was introduced to raise the point of impact. Today it's a matter of personal preference. I prefer the original flat MSH and any 1911 I get that has an arched MSH gets retrofitted.
2. The original M1911 and the M1911A1 had internal extractors. Browning was no stranger to external extractors, yet he chose to use an internal extractor for the M1911. Why? Imagine dragging a 1911 with an external extractor through a muddy trench and then trying to shoot it. A purist might argue that a "1911" with an external extractor is not a 1911. (And, in fact, I have done so.) Who uses the external? Kimber tried it, failed miserably, and has quietly been replacing slides for anyone with their external extractor who asks. SIG tried it, and also seems to have reliability problems. They tried to blame it on Caspian, who originally supplied their frames and slides. After changing suppliers, they still have problems. Meanwhile, Caspian has been selling the excess parts to custom gunsmiths, who don't seem to have any problem with them. Hmmm. And Smith & Wesson. Theirs work -- but S&W has been building semi-auto with external extractors for many years, so this is hardly a surprise. No other current 1911 manufacturer uses an external extractor.
3. The original M1911 did not have a full-length guide rod. Some advocates claim it precludes spring bind. Take a look at a 1911 and you'll see that the recoil spring is completely contained in four axes. There is, simply, no way the spring can bind. False argument #1. Others claim the added weight helps reduce muzzle flip and get the pistol back o target quicker. Candidly, unless you are a world-class shooter I don't think you can possibly see any difference due to the minimal weight increase. What the FLGR actually does is to needlessly complicate the take-down process. Like the arched MSH, any 1911 I bring home that has a FLGR doesn't keep it for long. I have a drawer for them. Since shortie guides for Colt Officers ACP models are no longer available, eventually I'll probably chuck them into a lathe and cut 'em down to make Officers guides.
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Bottom line: Get her the one she likes. What was Cooper's quote about the 1911? Something about all you need is a decent trigger and sights you can see ...
My personal choice today (for a new 1911) would be a Colt's 1991 series Commander ... in blue.