Posterity

"A single word is etched inside the barrel: "Anastasia-1.""

Posterity is a Legendary Hand Cannon that can be acquired from the Disarmament encounter in the Deep Stone Crypt Raid. Opening the Disarmament Spoils chest, accessible after defeated Taniks, the Abomination, has a chance to drop this weapon.

Perks
The weapon is eligible for randomized perks, but the following is the curated roll. The curated roll currently does not drop from the raid. The following are the randomized perks for the weapon.
 * Precision Frame: Recoil pattern on this weapon is more predictably vertical. Fires quickly with high accuracy.
 * Polygonal Rifling: Barrel optimized for recoil reduction. Increases stability.
 * Extended Mag: This weapon has a greatly increased magazine size, but reloads much slower. Greatly increases magazine size. Greatly decreases reload speed.
 * Genesis: Breaking a combatant's shield with this weapon fills its magazine from reserves. Energy weapons regenerate ammo on hit when matching the damage type to the combatant's shield.
 * One For All: Hitting three separate targets increases damage for a moderate duration.
 * Magazine Perks:
 * Tactical Mag
 * Appended Mag
 * Extended Mag
 * Accurized Rounds
 * Steady Rounds
 * Alloy Magazine
 * Flared Magwell
 * 1st Perk Slot:
 * Rapid Hit
 * Feeding Frenzy
 * Fourth's Time the Charm
 * Reconstruction
 * Surplus
 * Killing Wind
 * 2nd Perk Slot:
 * Demolitionist
 * Rampage
 * One for All
 * Opening Shot
 * Unrelenting
 * Redirection

List of appearances

 * Destiny 2: Beyond Light