Why go with suspect non-mil-spec bolt carriers when you can get a made in the USA, 100% mil-spec, M16 bolt carrier group?
Stag Arms M16 5.56/.223 Bolt Carrier
$214.99
Anderson Rifles Complete M16 Bolt Carrier Group
$239.99
Rainier Arms BCG - Precision Match Grade Phosphate
$249.99
BCM M16 Bolt Carrier Group
$299.99