It's not an obsession with FN barrels; it's more that FN makes a great barrel and with PSA and Spikes sourcing from them, it shows they want to play on the level of the better companies like DD etc. Not saying they're there yet, not saying they're not either because not enough time has passed and not enough rifles are out there to know, just saying it's a step towards being a company that makes a legitimate defense or duty product. I don't think anyone would dispute that DD's CHF barrels are very nice.
BCM does not use DD barrels. Paul made that clear in thread on another site. They never have used them.