How rare are the no drain hole front sights?  I have been trying to find one for quite a while, including WTB posts on this sight.  I have  had ZERO luck.  How rare are these, and does anyone know of a source for one?  Thanks.

You could probably have a new one welded up but most originals are still attached to barrels.

I bought one about 2 years ago, and I believe I paid 75 bucks. It was from an individual that used to put older/rarer/retro items in the EE.  He was from the Hartford, Conn area.  Since then I have "made" several by bead blasting a "no forge code" early drain hole sight, then grinding the forge flash off, then taking a set screw (whatever size they are......maybe a 6-36) and turning a small "tit" on the end of it. After grinding said "tit", screw the setscrew down through the threaded hole in the sight until the tit protrudes through the hole. Using a Tig welder I then fused the tit to the sight. That leaves enough metal raised up where the hole was to grind it to make it look like a continuation of the forge line. Reparkerize and, viola........no drain hole sight.

My early 604 upper has one ; I have no idea of the scarcity.

The drain hole was added as an A1 improvement in 67.

No drain fsb's were made from early 64 to fall 67

I have one lol

I just sent you an email.