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All matter tends toward entropy. Your hand will speed it on its way.
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— In-game description

Mos Calamus I is an uncommon hand cannon which can be equipped by all classes at level 34. It can also be transferred between characters using the vault. Mos Calamus I can be dismantled to generate upgrade materials.

SourcesEdit

Mos Calamus I can be retrieved from one of the following activities/vendors:

Quest source icon Quest
This item can drop as a Quest reward.
Strike source icon Strike
This item can drop as a Strike reward. Exotic items can only drop from the most challenging Strike playlist.
The Taken King source icon The Taken King
This item requires the Taken King expansion.

UpgradesEdit

Mos Calamus I can also be upgraded with the following perks:

Column 0Edit

Kinetic Damage perk icon Kinetic Damage
This weapon causes kinetic damage.

Column 1Edit

Random perk icon Randomly Selected Perk
This could be one of three randomly selected perks.
Iron Warrior Sights perk icon FastDraw IS
Standard sight.

A lightweight design, good for recoil control.

Iron Warrior Sights perk icon SteadyHand IS
Stable sight.

Optimized for excellent recoil control.

Iron Warrior Sights perk icon QuickDraw IS
Agile sight.

Lightning-fast handling.

Random perk icon Randomly Selected Perk
This could be one of two randomly selected perks.
Iron Warrior Sights perk icon SureShot IS
Snapshot sight.

Excellent handling. Superb target acquisition.

Iron Warrior Sights perk icon TrueSight IS
Flexible sight.

Light, with good recoil control. Strong target acquisition.

Column 2Edit

Random perk icon Randomly Selected Perk
This could be one of sixteen randomly selected perks.
Partial Refund perk icon Partial Refund
Chance to return a portion of the magazine after an assist.
Perfectionist perk icon Cascade
Melee kills automatically reload a portion of this weapon's magazine.
Underdog perk icon Underdog
This weapon gains a boost to range and handling when health is low.
Eye of the Storm perk icon Eye of the Storm
This weapon becomes more accurate as your health gets lower.
Rescue Mag perk icon Rescue Mag
Chance to refill this weapon's magazine when critically wounded.
Life Support perk icon Life Support
Kills with this weapon while critically wounded have a chance to start regenerating health.
Danger Close perk icon Danger Close
This weapon gains increased reload and handling when two or more enemies are in close proximity.
Surrounded perk icon Surrounded
This weapon gains bonus damage when three or more enemies are in close proximity.
Last Resort perk icon Last Resort
This weapon handles and reloads faster when the wielder is the last living player of their Fireteam.
Exhumed perk icon Exhumed
This weapon gains improved range and handling for a short time after revival.
Relentless Tracker perk icon Relentless Tracker
Kills with this weapon grant enhanced motion tracker resolution for a short time.
Triple Tap perk icon Triple Tap
Rapidly landing precision hits will return one round to the magazine.
Hot Swap perk icon Hot Swap
Readying this weapon grants a brief period of bonus accuracy.
Outlaw perk icon Outlaw
Precision kills with this weapon dramatically increase reload speed.
Spray and Play perk icon Spray and Play
Increases the reload speed of this weapon when its mag is empty.
Rangefinder perk icon Rangefinder
Aiming this weapon increases its effective range.

ReferencesEdit

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