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Can someone tell me if the parts (barrels etc) for these two are interchangeable? Thanks, Dave
" The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants" Thomas Jefferson.
Molon Labe
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Yes, the parts interchange.
The 1911 was modified into the 1911A1 after WW1, but those modifications could almost be described as cosmetic. Slightly longer hammer spur, arched mainspring housing, reliefs on the side of the frame for the trigger finger, checkered trigger face, etc.
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RickB,
Thanks for the reply, I appreciate it.
Dave
" The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants" Thomas Jefferson.
Molon Labe
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Dave,
Just so you know, I believe the A1�s started just after WW1 so if you have a for real 1911 you might want to leave it as is as it could be worth some money.
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That's a shorter, narrower hammer spur, longer grip safety tang, on the A1.
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Assuming that's not a typo, the 1991A1 is a recent Series 80 kind of thing. Longer beavertail grip safety. A firing pin safety tied into the trigger mechanism. (There was a 1911A1, which some of the other responses seem to be addressing...but that's not a 1991A1)
I have an older Colt Commander (no firing pin safety) and a 1991A1 Commander, so I'm not just quoting something I read.
Barrels don't simply interchange, but you can have a gunsmith fit a 4.25" barrel for a 1911 to a 1991A1. A lot of the 1911 parts drop in. (Mainspring housing, sear spring, trigger, recoil spring guide, etc.) The firing pin is different. The 1991A1 requires the Series-80 type with the "wasp waist" for the firing pin safety. The slide is different, as it has machining for the firing pin safety. There are internal "links" for the safety.
Try to get an exploded diagram for a Series-80 Colt. Anything related to that firing pin safety is going to be different.
.30-06 Springfield: 100 yrs + and still going strong
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Boy are you right!  I didn�t even catch that when I saw the thread.
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The Model 1911A1 entered production as a transition model in 1924, with S/N 700,000 to 710,000.
The first "real" 1911A1 is considered by many to be the serial numbers after that, or the "1927 Model", like the ones made in Hartford for Argentina ( until Colt built a factory down there ).
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All a moot point now that I actually went back and read what the original question was! My eye/mind saw 1911 and then A1 and it whizzed right by the 1991. It�s hell getting old.
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