Hybrid

Hybrid may refer to a number of "Hybrid" sights featured in multiple games, including:
*Hybrid Sight - An attachment for assault rifles in Call of Duty: Modern Warfare 3, for multiple weapons in Call of Duty: Advanced Warfare, and integrated to the RPR Evo/Ripper submachine gun in Call of Duty: Ghosts and Call of Duty: Infinite Warfare. It also appears in Call of Duty: Modern Warfare as the 4.0 Flip Hybrid. 
*HAMR Scope - An attachment for submachine guns in Modern Warfare 3.
*Hybrid Optic - An attachment for assault rifles and light machine guns in Call of Duty: Black Ops II. It also appears in Call of Duty: Modern Warfare as the Integral Hybrid.
*VMR Sight - An attachment for assault rifles, submachine guns and light machine guns in Call of Duty: Ghosts.
*Thermal Hybrid Scope - An attachment in Call of Duty: Ghosts and Call of Duty: Modern Warfare.
*Tracker Sight - An attachment for most weapons in Call of Duty: Ghosts.
*Varix 3 - An attachment in Call of Duty: Black Ops III.
*Scout Hybrid - An attachment for non-hybrid weapons in Call of Duty: Infinite Warfare.
*VMC - An attachment that only functions as a hybrid sight for non-hybrid weapons in Call of Duty: Infinite Warfare.
*Dual Zoom - An attachment in Call of Duty: Black Ops 4.
*Recon Sight - An attachment that only has a hybrid function in Call of Duty: Black Ops 4.
*Canted Hybrid - An attachment in Call of Duty: Modern Warfare.
Additionally, the Hybrid Mags appear as an attachment in Call of Duty: Black Ops 4.