@Community Member posted:
I've been eyeing the BRN-180 uppers. I have not yet seen any reliability reports for high round counts. Has anyone gotten any feedback on how well they hold up?
I would do a search on YouTube for some of the reviews. I haven't seen any long term reports, but several match reports by Karl Kasarda of InRangeTV, Ian McColloum at Forgotten Weapons and Russel Phagan at SinisterRifleman. I would consider them useful for their opinions on heat, reliability, etc. But not a long term reliability report.