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3/5/2011 9:01:13 AM EDT
I have a Colt 6920 stripped barrel that I never had the original front sight base for.  I decided to buy a used F marked FSB (sure it's not Colt but whatever...  It's my Franken M4 budget build anyhow).  I am sure it's a 1 in a zillion shot that the pins holes in the FSB will align with the drilling on the barrel itself.

So do I just mount and drill thru the existing FSB holes?  Would it be best to go a bit over sized in case the drillings on the FSB and barrel kinda line up?

Never tried this before, I have the idea on it but want to check with others who have done it previously before I go ahead and screw something up..
3/5/2011 9:48:55 AM EDT
[#1]
Tap it for set screws. The holes are not going to line up as they are for taper pins. If they do happen to, then it's a miracle & you have nothing to worry about.
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