Aero precision ar15 complete upper 16" carbine 5.56/223 Other Features: Standard ar15 upper receiver 16" 5.56 carbine barrel, with pinned fsb, a2 flsh hider m4 hanguard carbine length gas system this complete upper does not, includes a bcg or chg handle

Aero precision ar15 complete upper 20" carbine 5.56/223 Other Features: Standard ar15 upper receiver 20" 5.56 carbine barrel, with pinned fsb, a2 flsh hider a2 hanguard carbine length gas system this complete upper does not, includes a bcg or chg handle