From Destinypedia, the Destiny wiki
Heritage is a Legendary Shotgun that can be acquired from either the Replication or Disarmament encounters in the Deep Stone Crypt Raid. Opening either the Replication or Disarmament Spoils chest, both accessible after defeating Taniks, the Abomination, has a chance to drop this weapon. This weapon (along with all other Deep Stone Crypt weapon) can also be directly selected as a chest reward after having received one as a random drop from the Raid. As of the Season of The Chosen, it is one of only two non-Exotic kinetic slug shots in Destiny 2.
The following is the curated roll. It does not drop-in game.
The following are the randomized perks for the weapon.
List of appearances