BCA had some 450 Bushmaster uppers for a pretty good price. I have a couple (2) ARs but in no way am I an expert. If I bought an upper to put in a lower that I am using for .223/5.56 would I need anything else ? Mags with a proper follower ? It would be used for hunting deer, is there any advantage to 18" over 16" ? For $250-$270 it seems like a nice option to have.
-Jeff
-Jeff