El Rojo
Member
I want to get a 16" upper for the FAB-10 and initially I wanted to get a complete kit so I would have the bolt match the headspace on that barrel. However, there are losts of ARs out there that are a bunch cheaper without the B, BC, CH (bolt, bolt carrier, chargin handle). So what do I need to know about headspacing? I don't think buying headspace guages will help because don't they cost just as much as the B, BC, CH? Thanks for the help.