The 1.59 Inch Breech-Loading Vickers Q.F. Gun Mk.II, also known by its nickname of the Vickers-Crayford Rocket Gun due to its distinct flaming muzzle flash, was a 40mm light artillery piece developed by the British near the end of World War I. The Vickers Q.F. Gun was intended to be used by infantry in the trenches to attack bunkers and machine gun nests, but saw little use due to the Stokes Mortar being cheaper and easier to use. The weapon was instead adapted for air-to-air use on attack craft to destroy Zeppelins and Observation Balloons, but the weapon was withdrawn from service entirely shortly before the end of the war due to misfire issues in combat.
The Vickers Q.F. Gun Mk.II appears in Battlefield 1 as the AT Rocket Gun, depicted as an anti-tank infantry weapon available to all factions.
It inflicts moderate damage against armor from considerable range, although it leaves the user somewhat vulnerable compared to other anti-tank weapons in the series. Due to its pedestal mount and slow muzzle velocity, it is ill-suited to attacking aircraft, but can nonetheless be aimed upward from certain surfaces. However, it can be useful for attacking enemy infantry from a medium distance, where a direct hit anywhere to the body at any range results in a kill.
The user must aim carefully to strike armor at a solid angle. Glancing hits will ricochet with no harm done to the intended target, where other AT weapons might instead inflict minimum damage.
The shell fired from the AT Rocket Gun does create splash damage if it strikes a structure close to the operator by mistake. This is also true if if the player is too close to a vehicle when destroyed.