There's two knock-out pins on the bottom of the front sight. Also, you'll need to take the sling adapter off, there's a hex screw underneath it.
As for suppressors, there's quite a few that'll go on over a flash suppressor, just gotta look around and find something you like.
As for suppressors, there's quite a few that'll go on over a flash suppressor, just gotta look around and find something you like.