I don't have a 16" upper (yet) but the first thing my brother did when he got his RRA M4 tactical entry was substitute an A2 stock for the shorty. Looks fine to me and it's much more natural to shoulder. Without body armor on the shortys aren't real easy for someone of average to large build to get a proper cheek-weld. I fully appreciate the purpose these were intended for but I personally have little interest in setting up a configuration that isn't 100% practical for my purposes. I don't have any pre-bans and can't get used to the idea of a "simulated" collapsible CAR stock. If it's stuck at the same length as an A2, I'd rather have the A2!(praying for the sunset to happen so I'll be able to get the real thing!) The ACE ARFX looks like a cool alternative too. These thoughts are strictly my opinions and aren't intended to rile anyone up. Hell I think they [u][b]ALL[/b][/u] look good, it's just a matter of what fits best to each individual. Unless someone else wants to give me the $$$ to set up my rifle, I'm picking out what I like!