First off, get a Williams or Lyman receiver rear sight (peep sight.) Then a good fibre optic front and you're set.
In the meantime, a black magic marker over the front will work wonders.
I didn't fight to defend your freedom so you could vote to take away mine.
"A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself.
John Stuart Mill."