This is a slightly used (500 rounds), Pre-ban, Rock River assembled complete A3 upper. Barrel is heavy under the handguards (for you full-auto people), M4 profile, chrome-lined, with A2 FS. 5.56 NATO chamber. 1/9 twist.
Upper has keyhole stamp and very slight wear on the brass deflector.
RRA improved bolt group and charge handle included.
[s]$450[/s] $400 shipped. Paypal +3%