I asked Marc whey they don't come pre drilled...

To allow for any tolerance differences on the location of the retention pin hole in the barrel as drilled during manufacture. Only a few thousandths of an inch i.e. .001-.003, or the thickness of a sheet of paper will keep the new sight from fitting it's best. It is a pretty anal detail, but a detail nonetheless.

I will predrill if a customer feels like all thumbs and can not do it him/herself, but I charge an additional $5.00 and do not/cannot guarantee a great fit (although they are very close/good)

Marc

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