I am working through my first build, lower is built, optics purchased, waiting on funds before I buy the upper. Rail covers is one of the few details I havent decided on yet. I see a lot of people using the XTM rail covers, does anyone like the magpul ladder style rail covers? The XTM system seems a little thick, I want to protect my fingers from the exposed rail without adding much size if possible. Please post your favorite rail covers and any rail covers you have had problems with.