Sounds like you have an early one. There's supposed to be a little notch for clearance there and early ones didn't have it. So they wore their own notch.
Many here just cleaned up and created a presentable notch.
At least this is what your description sounds like. I'll seek out a thread that talks about that.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."