History of Hardline Cut

Overview

Hardline Cut is a Legendary Arc Sword (Heavy ammo). The Destiny Game Wiki lists an Adaptive Frame with the "Nail, Meet Hammer" origin trait, random rolls across blade, guard and trait columns (Tireless Blade, Whirlwind Blade, Vorpal Weapon among options), Impact 62 and Swing Speed 40, and dates it to Season 28.

Acquisition

Bungie's source text lists the Monument of Triumph. Blueberries.gg's Monument of Triumph weapon list gives the source as a "Lawless Engram". The Destiny Game Wiki does not detail acquisition, and none of my sources state craftable or Adept status. Note the Season 28 date suggests it predates Monument of Triumph, so it was probably reissued there (not confirmed by a source).