I like the ACE ARFX stock rather well, but it will be the last thing I buy for my AR. The A2 stock will work for now.
As for the scope, I'm thinking about going with a Pride Fouler 3x9 22lr scope. It has horizontal lines for different yardages. Since the speed of a subsonic 300 whisper is close to that of hv 22lr, I think the Pride Fouler would be my best bet.
http://www.rapidreticle.com/22lr3-9x32.htm I do need a riser but don't know what to buy. Something cheap but well made.
swampf0x