As to the photo above [please don't take it personal]
I am a BIG OPPONENT TO REMOVING THE BACKUP OPEN SIGHTS or making them unusable-just like a so cold scout mount above
No matter what, there must be back-up sights, especially, if you are creating SHTF/ hunting rifle: check any modern hunting rifle... there is even no any open sights on most of them.
Did those ppl, who created those, hunt? May be they did in an ideal greenhouse?