They are very good for the money, I personally have a 1G and it does neck down but that part bolts off to make it a full 3" Its the ETS version n1 style i have had a real n1 and the only diff is the true n1 is made a little better fits a little better and costs a hell of alot more. For the 250 shipped i spent i am happy
, also try going to other threads like the user reviews, the FAQ is always a nice resource to utalize.