The improved sights aren’t actually a scope at all, but rather a side effect of equipping a particular barrel. You will need to equip the Tempus 26.4″ Archangel, but you can’t do that right ...

The Archangel stock used on the M1A Loaded ... The M1A loaded comes with more precise national match iron sights, ... The rear sight also has 1 m.o.a. elevation and 0.5 m.o.a. windage adjustments ...

Tempus 26.4” Archangel (Unlocks at level 36) Operator Reflex Sight (Unlocks at level 7) ... instead choosing to use the weapon's iron sights and save the attachment slot for a weapon Perk.