06-19-2012, 02:06 AM
The beauty of the AR platform is that any AR15 upper assembly will mount to an AR15 lower...so yes, you can have 1 lower and have multiple uppers (6.5 Grendel, Beowulf, 300 Blackout, 458 SOCOM, 6.8, .22, .223, etc, etc, etc.).

