Reflex Sight
Precision red dot sight
The most basic of all sights, the Reflex Sight is a simple red dot. This provides a clean and clear view on target, and for weapons with obscuring iron sights, this is a good replacement.
For weapons with clear iron sights, you may not want to burn a Pick 10 point on this sight, but if you plan to fight at a distance regularly and you dislike the irons, it can be worth the investment.
Recon Sight
Enhanced zoom sight
A basic optic with more zoom compared to the basic Reflex sight.
Best taken on Assault Rifles customized for long range, or on some Sniper Rifles if you plan to fight on the move.
The Recon Sight is a poor choice for CQC, so make sure you have a backup weapon for short range fights, or the Quickdraw and/or Laser Sight attachments to give you a fighting chance up close.
Varix 3
Magnification Optic. Press right analog while aiming down the sight to switch between zoom levels.
A mix between the Reflex and the Recon, the Varix 3 gives you the ability to toggle between zoom levels, and it does so while you are ADS with an instant modification to the holographic sight.
The key to using the Varix 3 well is making sure you always have the right zoom level selected for the range of engagements you expect in any given area. Losing time changing focus while targets are moving (or shooting!) is a bad idea.
Thermal
Identify enemies by detecting their increased heat signatures against the environment.
The Thermal scope is a powerful optic that highlights enemy targets in bright colors against a dim background. Only the Hard Wired perk protects against this highlighting, and it makes spotting enemies in the distance, in the dark, or behind cover quite easy.
The downside is the Thermal scope is a bit cumbersome, and your view is restricted compared to the more open sights, so you can get tunnel vision and get flanked and killed if you aren’t careful about checking your surroundings periodically.
BOA 3
Biometric Object Analyser.
Illuminates red when an enemy is in frame, or blue for a friendly.
ELO
Emitted Light Optic.
Iron sights with a floating point illuminated reticle.