bolt carrier group

[wideopen231]

 Wondering how much difference there really is in bolt carriers. HAve seen bunch of different material./finishes  and read up on benifits. From a durability and accuracy what is better and why. New guy gathering info and all can be helpful. Not looking to make malke parts feel mbetter just build accurate and very dependable rifle. HAve  too many hobbies(drag race  and cpl Harleys) to spend extra for little or no real benefit. Input

[Armed Eye Doc]

Toolcraft makes a great bcg at a great price.  They make many bcgs for other brands as well.