For those of you looking to build an AR9. Here is a Ghost upper with 7.5" barrel and 7" M-Lok handguard for $230-$250 depending on color, and there are a bunch of cool colors.
For those more traditional builds, here is a 16" 5.56 NATO 1:8 M4 Vital Stainless Steel Fluted Spiral Barreled Upper with 14" M-LOK Rail for $270.
Yes, that is a spiral fluted stainless steel barrel with free float handguard built by Ghost for $270! Ghost is in Florida for those who want to know.