Aero Precision AR-15 A2 Complete Upper 5.56 NATO 20"

This is the same complete upper Aero Precision puts on its M16A4 Special Edition rifle. A standard M4 upper receiver carries a 20" 5.56 NATO rifle length barrel with a 1:7 twist, a rifle length gas system and a standard A2 flash hider.

The classic A2 setup is all here: a pinned A2 front sight base with bayonet lug, an A2 detachable carry handle with rear sight, and an A2 style rifle length handguard. Bolt carrier group and charging handle are not included, so plan on adding both.