Thanks to everyone who helped out when I asked on the tech forum. I went ahead and did it.
Once upon a time I got a Box O' Parts with a classic rail in it that I swear, someone took the anno off with a grinding wheel.
Skip ahead a few years. I decided to make a nice smooth classic rail by milling the side rails off. I'm sending it out to be anno'd black, but I think it came out nice and I couldn't wait to post pictures.
From the front. I rounded off the front. The foregrip I'm going to use is going to look fine.
The rear...I had to cut into the locating pin channel, but it seems to hold in a valve just fine.
There's still enough meat to hold in the sear pin...
I'll post pictures when it's done and mounted on the gun.