I am looking to pick up my first one for my AR in 5.56 anyone have some opinions on the options out there and what to look for and or avoid?

JYD#176
"dein Gott schickte mich zu zerstören"
"Sic semper evello mortem Tyrannis"
"Sometimes the chance of a zombie outbreak is the only reason I need to make many of my life's Decisions." General Delivery