ltwguns.com

<><> I just purchased a used CCO...

When I was cleaning it I noticed a "1"
stamped in the firing pin stop...

Does anyone know what "1" refers to ???

Thanks,,,

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<><> Raspy <><>

YOU'RE #1, Man!

That would be a Colt .45 FP stop. There are a few numbers for Colt's FP stops, but the only one I know if the #1.

~Jim Keeney

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"I'd rather die on my feet than keep living on my knees." - Emiliano Zapata, Mexican Revolutionary

I have been told that the #1 is the original fit firing pin. If it is another number, it had to be oversized and then fit. #1 is better I would assume.

I've seen this question posed on some of the other 1911 forums and some usual knowledgable people have replied that the number indicates the fit, 1 being for a tight groove and 2 being for a groove machined a little wider. Apparently Colt makes more than one size stop to speed the assembly process, if the groove is wider don't fit the stop just get a #2 stop and proceed. I checked all my Colts and most are #1 with a few #2, except one SS series 80 I have has a #1o stamped on it just as I typed a normal height 1 and a slightly smaller o. I have not checked it with a micrometer yet, but I doubt it indicates an oversize stop.