This mod doesn't have a portal gun.
Need map building blocks from Portal? There are mods, both better and worse, but our mod adapts to Minecraft version 1.16.5, because many mods were left without further development and work only on older versions.
Latest Version Features:
/ / Portal-able and Non-Portal-able Walls
/ Also chiseled versions of these blocks!
/ / Test Chamber and Aperture Doors
/ / Toxic Water (works like lava, but faster)
/ / Vital Apparatus Vent
/ Has a hole for unloading mobs or entities from it!
/ / Smooth End Stone
\ \ Has support for the Russian language.