Which are you?

★ Magnifier ・Close Range Oriented ・Able To Adjust To Multiplicative Zoom Levels Quickly ・Taken Off Makes Weapon Lighter

Scope or Magnifier

★ Scope ・Long Range Oriented ・Analogue Variable Magnification ・One Function Is All You Need

My body can't handle using a scope all day...!

A certain Will Smith rifle

I often use a removable magnifier! ※From a physical standpoint