Tenet Spirex is the Tenet variant of the Spirex railgun pistol. It fires Heat explosive projectiles with extreme projectile speed, and a successful headshot grants the Bullseye Reload buff, which speeds up reloading by 25 percent and stacks twice for 50 percent.
The buff lasts four seconds, and reloads drop to about 1.9 seconds at one stack and 1.6 seconds at two. You get it by vanquishing a Sister of Parvos who spawned with it. The weapon is not tradable, only a converted Sister in a Crimson Branch dojo room.
Tenet Spirex was added with Update 30.5 (July 2021).
Requires Mastery Rank 14.