Feb 1, 2014 #21 S Sling10mm Expert Rating - 0% 0 0 0 Mar 12, 2012 1,117 38 Why go 9mm when you could have a 10? Seriously though, it just depends on what you want to spend. The AR would be more versatile since you could use one upper for multiple caliber uppers (9mm, 5.56, 6.8, etc.), and would most likely be less expensive.
Why go 9mm when you could have a 10? Seriously though, it just depends on what you want to spend. The AR would be more versatile since you could use one upper for multiple caliber uppers (9mm, 5.56, 6.8, etc.), and would most likely be less expensive.