Here are the 2 that I want to upgrade to. Aero Precision because I like their product and Rock River arms because I like their product. Is there something else out there I am not seeing? What is better Nitride or Chrome?
5.56 Bolt Carrier Group, Complete - Black Nitride
Rock River Arms: Complete Bolt Carrier Group
5.56 Bolt Carrier Group, Complete - Black Nitride
Rock River Arms: Complete Bolt Carrier Group