I learned my lesson and henceforth my plan is to just buy Colts from Specialized Armament. With rail and sights the Operator is $2200 but it is definitely worth it to me.
Colts are fine weapons
BUT for 2200.00 I will take the ones I have put together and have a butt load left over for optic's and ammo
and I assure you they are tack drivers and function every time the trigger is pulled.