The protrusion at the forward end of the barrel lump appears to be bent downward, as you have noted. I don't know the correct name for the part.
It may have gotten bent by attempting to reassemble the gun while it was uncocked. Sometimes with Bakers, it may help to hold the top lever firmly to the right while installing the barrels. But it will need to be cocked.
If that piece is bent down, it may be unable to engage the cocking hook in the lump recess. I seem to recall that piece is spring loaded, and is pushed to the rear when you install the forend. But it's been awhile since I shot any of my Bakers.
