Holland&Holland wrote:Item 2) Head spacing. If both parts are built to spec this is not an issue. If you are concerned you can have this checked easily enough. Some barrel builders used to allow you to send them your bolt to ensure head spacing. Now the ones I order from no longer even do that. With a quality BCG and something like and Aero P upper, I would not be concerned.
Removing/installing the BCG is easy, but color me completely surprised that mixing and matching BCGs, without headspace concerns, is OK! Good to know I guess. I wouldn't have thought to do that.
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