"The MagPul MBUS Gen. 2 rear back up sight is a high quality and super durable rear iron sight. Although it is a bit pricey, its super reliable and gives your AEG a sleek look. I put mine on my masada and it looks beast! And when i want to put an optic on i dont have to go through the pain of taking it off because it keeps a very low profile when folded down. I recommend this to anyone who wants a very accurate sight."