Hah! Your average 6 year old could just reach up and break one off.
I broke mine off right away. If you want one I'd consider drilling the hammer for a bigger thread.
In the end I didn't need it, as I used a higher mounting.
The first was modified from a Thompson, that I carved a bit of ejection relief into. I didn't paint the raw aluminum and you can see my mods. I had to re-drill the base to match the 464 holes.
But you can't see the irons with these rings.
Eventually I modded a couple Kwik-site Thompson bases that allow me to see the irons too. I also swapped the Tasco for a silver Leupold.
These were trimmed and re-drilled. It was some work (not much!) but I wanted everything silver. LOL
I made the second one up because the first (shown mounted below) only allowed 3 screws. The longer mount was trimmed to allow full contact and 4 screws.
This is the current mount.
You can see there's plenty of hammer clearance.
I would suggest you stock a spare extractor or two. They are cheap and easy to change. They can easily break trying to extract a stuck case.
Don't try to extract a stuck case with the lever. Use a rod and poke it out from the muzzle, or you'll break the tip off of the extractor like I did.