Ok well here is what they look like.Bold sights are the Glock factory version
with a square notch rear. GL-846
You can only get those from Glock now.
Ameriglo no longer sells them.
The FBI / Agent sights are GL851 and
have a U notch rear.
Gen 5 use a GL-5517 and have a .140 front (wide)
.200 is the height. And thin is .125