1990 picture window exterior glazing(?) change

In my bay window (not openable one/stationary/picture), I notice the exterior rubber seal/glazing bead turned rigid and protruding out needing replacement.

Please help me with..

- identifying the right glazing bead.
-help me understand what is holding the sash in this window model, if I pull off the glazing should I expect the sash to be coming off?


I do not see any branding on this window, however I notice 'MilGard' in the adjacent window.