History of Erentil FR4

Erentil FR4 is a Legendary High-Impact Fusion Rifle (Void, Energy slot) from the Year 1 Gunsmith pool in Destiny 2.

Overview

Slow-firing, high-damage frame (Impact 95, 860 ms charge, 6 bolts). Curated trait Under Pressure (better stability and accuracy as the magazine empties); random rolls include Backup Plan, Kill Clip and Rangefinder. Made by Omolon. Elemental damage: Void. See Adaptive Frame-style archetype notes on the weapon-type page for its weapon type.

Acquisition

A Year 1 (Destiny 2) Legendary from the Gunsmith: earn rank-up packages from Banshee-44 (Gunsmith Engrams). It was re-implemented as a Year 2 weapon. Like the rest of the Year 1 pool it is not craftable, has no Adept variant, and is not currently a focusing target in the sources checked; the sources I opened do not give a current sunset/reissue status beyond what is noted here.