No!
Couple guy`s at my club use them. One is on a SP-1 on a carry handle scout mount and another on flattop sporter .Some run scopes one guy has a 2.5x10 with a small red dot on free floattube about 45degree angle looks weird but works well for the close stuff.I ran a tasco PDP5 reddot onaarms#5 mount on my 20 inch sporter H-bar i liked the adjustable dot size.