I was able to use weapon variants in customs

I was messing around in the custom games options for the fiesta slayer mode and found when I reenabled the weapon racks, not only are they random too but weapon variants can spawn in those racks. For instance, on the map Live Wire I found a white Skewer that shot an explosive spike and an unbound Plasma Pistole that is white that has a shotgun spread for its overcharge. I even found variants of unsc weapons like a variant of the Sniper that had a much bigger reticle or a Sidekick with no bloom.