If you did not have a rifle, $1500 to spend.
Option 1: Geissele 16 inch Superduty, Geissele BCG, Radian Raptor Charging Handle, Radian Talon Selector
Option 2: PSA 10.5 upper, PSA 16 upper, Eotech XPS 2.0, Sig Tango 1-6, PSA BCG and Mil Spec charging handle. All of that for the same as option 1.