https://www.reddit.com/r/halo/comments/qx900n/list_of_weapons_and_their_zoom_levels/
Quote:
1.4x - Sidekick, Sentinel Beam, Ravager, Pulse Carbine, Plasma Pistol, Needler, Mangler, Assault Rifle, M41 Spankr, Disruptor, Bulldog
2.5x - Commando (the scope is 2.0x but it falls into this category in the sensitivity settings), BR75
3.0x - Stalker rifle (zoom level 1), Skewer (zoom level 1), Shock Rifle
5.0x - S7 Sniper (zoom level 1), Skewer (zoom level 2)
6.0x - Stalker Rifle (zoom level 2)
10x - S7 Sniper (zoom level 2)
Extras:
Cindershot - 1.4x zoom - only weapon that’s alternate fire kicks in when zoomed in - the projectiles become guided by your aim
Melee Weapons - Hammer, Sword
No zoom/alternate fire weapons - Hydra, Heatwave