If your wanting it for hunting and plan to put a scope on it get one with no frount sight, they told me I would never see it through the scope, I did and it drove me nuts, so I paid to have the gas lock changed. I am also a big Rock River fan. I have 2 lowers and 4 uppers, all RR except the .204 upper and all shoot real well. I also don`t like the colapsable stock for hunt or realling any kind of shooting. Go to a range where you can rent them and try acouple of different models and see what you like best. I didn`t and I made alot of changes, they all cost.