
The Advanced Research perk helps to make rail guns - weapons of technology level 8 (as well, as energy weapons, and power armors). Rail guns were mentioned in connection with its technology level and Advanced Research perk only. Sawyer's Fallout PnP doesn't mention Artemis and 15mm EC ammunition as present in its world (15mm EC reference was accidental). The player will simply reload the gun and face the intended target, never firing. Fallout 3 New Vegas Van Buren Numbered Vault 101 Cosplay Costume. Fallout 76 Halloween Helmet Cosplay Accessory Prop. Fallout 4 Brotherhood of Steel Uniform Cosplay Costume. Even when fully loaded, the gun may not fire. Fallout Preston Garvey Brown Shoes Cosplay Boots.
While it doesn't appear in the Van Buren tech demo, it is still present in the game files and can be spawned with the console command Template:Console, but remains a non-functional weapon.
ARTEMIS was an unfinished weapons project by Poseidon Energy and the Enclave, designed as a late-game weapon that could be crafted by characters with a high Science skill, using schematics from Mesa Verde.