Elutuzem-pattern stalker rifle
From Halopedia, the Halo wiki
The Stalker Rifle is a semi-auto directed-energy weapon that serves as a hybrid between the Vostu-pattern carbine and the Beam Rifle. It is capable of venting, but if fired 7 times in a row without waiting, the Stalker Rifle will overheat. It is capable of killing a Spartan in 3 headshots in multiplayer. In the campaign, the Stalker Rifle is wielded exclusively by Kig-Yar Snipers, though if it dies, the weapon can be picked up by Sangheili and Jiralhanae.
The stalker rifle was first revealed as a weapon included in with the Kig-Yar Sniper figure in the Halo Infinite line. Certain aspects of its design bear a resemblance to components of the Gadulo-pattern needle rifle.
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