Any of y'all have personal experience with AAC 5.7?

Got me an AR 5.7 upper with FA bolt and a registered lower. Was wondering if any of y'all have experience with this stuff through the 5.7 upper and if so, how well does it run? The price definitely has me interested.

Got me an AR 5.7 upper with FA bolt and a registered lower. Was wondering if any of y'all have experience with this stuff through the 5.7 upper and if so, how well does it run? The price definitely has me interested.