Call of Duty: Black Ops III
The Recon Sight is an enhanced zoom sight, offering a high zoom level similar to the ACOG Scope of past games.
It also increases weapon centerspeed by 5% and reduces idle sway by 90%. Due to this, the Recon sight is a powerful attachment on weapons with low centerspeed (weapons that don't return to the original viewpoint after firing quickly) or high idle sway, such as the Gorgon and the KN-44.
The Recon Sight is available for assault rifles, SMGs, LMGs, and sniper rifles. The Recon Sight can be steadied when used with a sniper rifle.
Call of Duty: Black Ops 4
- "Magnification Optic. Press CIRCLE while aiming down the sight to switch between 2.0x and 4.0x zoom levels."
- — Description
The attachment returns in Black Ops 4, simply referred to as Recon.