One is enough. – ×3.5 critical damage when aiming down sights (no bonus when hip firing). Extremely high weapon zoom. Increased weapon accuracy, handling, and reload speed. Reduced base damage.
Usage & Description
The Monocle is a powerful critical hit weapon, but should only be used as a long-range weapon as its increased zoom can make it difficult to use in close-range combat and the reduced base damage makes it less effective with non-critical hits.
FL4K's Fade Away synergises worse with this weapon than what might be expected: Although "Critical!" pops up on any Fade Away hit, the damage bonus of Fade Away is only based on gun damage and ignores any critical damage bonuses. Since the Monocle has relatively little gun damage, it benefits less from Fade Away than sniper rifles with lower critical damage but higher gun damage.