History of Mechabre

Overview

Mechabre is a Legendary Arc Sniper Rifle with an Aggressive Frame (72 RPM, 3-round magazine). Bungie's page lists Fluted Barrel, Accurized Rounds, Snapshot Sights and Opening Shot, with Search Party as origin. Its lore is a joke about a Titan wanting a mech suit.

Acquisition

A Festival of the Lost weapon from Season of Plunder (Destinypedia, which also says it is not craftable).