Quote Originally Posted by mark1 View Post
That way you can start with a tall sight and slowly file it down.
What I was thinking...but he needs the other part of the base.
To my knowledge, only one size front sight dovetail was ever made, even though some are tighter/looser than others. I had one that was pretty loose. I squeezed it in a bench vise with hard plastic jaw pads.
If you get one that is loose on your sight, you can do as I did, or peen it, or drop a tiny shot in the hole before the set screw....all of these I saw here
http://forums.thecmp.org/showthread.php?t=150087
I did the latter solution first, worked fine but after 3 months I got tired of seeing the gap and squeezed it.

When you purchase the rest of your sight, don't forget to buy the set screw too!

I found a reference to the various issued sight blade height:
A .537
B .522
C .507
D .492
E .477

Also the pin hole is not in the same place for -03 and -03A3 blades. you want an 03 A blade you can file down to whatever height you like. If that doesn't work, you can make your own as suggested.