S Solo New member Nov 22, 2016 #1 Interested in the 6.8 SPC will a 6.8 upper work on my AR-15 lower or do I need a AR-10 lower? Thanks in advance!
Interested in the 6.8 SPC will a 6.8 upper work on my AR-15 lower or do I need a AR-10 lower? Thanks in advance!
G GLShooter Active member Nov 22, 2016 #2 No need for an AR10. The 15 is what it was designed around. Greg Last edited: Nov 22, 2016