History of The Long Walk

Overview

The Long Walk is a Legendary weapon: Sniper Rifle (Aggressive Frame), 72 RPM, 3-round magazine.

Curated roll per the fan wiki: Chambered Compensator, Armor-Piercing Rounds, Slideshot, Quickdraw. Introduced in Season 15. Element: Bungie data lists Void, the fan wiki lists Solar; the sources disagree.

Acquisition

The fan wiki lists the Prophecy dungeon as its source and notes it cannot be reacquired from Collections. Bungie's item text instead points at the Emissary of the Nine / Trials of Osiris rank-up track, so the sources disagree; verify in game.

This is a legacy-style reward weapon. It is not a craftable or Adept weapon as far as the sources show, and sunset status was not stated by the sources I opened (the fan wiki is the main source). See also Prophecy and the Crucible for the PvP context.