History of Cruoris FR4

Cruoris FR4 is a Legendary Arc Fusion Rifle made by Omolon. Its flavor text reads "Your wounds will heal in time."

Overview

Both sources call it an Aggressive Frame fusion rifle (special ammo). The sources differ on stats: Destinypedia lists a 7-round magazine and 660 ms charge time, while Destiny Game Wiki lists 6 rounds and 660 charge time, so check in game. Destiny Game Wiki's curated roll is Chambered Compensator, Liquid Coils (more impact, slower charge), Stats for All, Successful Warm-Up (final blows speed charge) and the Omolon Fluid Dynamics origin trait.

Acquisition

Introduced in Episode: Heresy (Season 26 per Destiny Game Wiki). Destinypedia describes it as a world drop; Destiny Game Wiki says to open Legendary engrams and earn faction rank-up packages. Neither source says it is craftable, and neither mentions an Adept version.