I just checked and KNS makes .154, .155, and .170 so you can get a set that works for the Colt.
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I just checked and KNS makes .154, .155, and .170 so you can get a set that works for the Colt.
Even the best calipers cannot measure the inside diameter of small holes correctly. The readings will generally be less than actual diameter. You need something like this Starret small hole gage set to fit the insides of the hole properly and then measure the gage diameter with a good micrometer.
thanks to everyone.
I was actually getting measurements of .166 -.168".
Once I measured the pins, I then got a .170" reading.
I agree, it was difficult with my calipers.
I will continue to monitor the holes, but no longer that worried about it.
take care
Colts made in 2003 do not have .155" pin holes. They are .170"
That lower in the pictures has been refinished.
Not all 1990's are large pin.I have a Colt GS model produced in April of 1990 according to Colt research letter that is small pin.
It was not "found" in 1990. It was "produced" in April of 1990 according to Colts research letter.
edit: cause I guess Colt could be wrong.