It loses 4 durability every time the weapon is fired, making it one of the least durable weapons in the game.
It can only be found in Scorpion-7 and at the UFO north of Bellevue Golf Course.
Takes up ten slots in the inventory.
The maximum loaded ammunition capacity is just one.
It cannot use barrel attachments.
The Shadowstalker has been added to the game.
Increased most damage values and multipliers.
Removed the "green ring" firing effect.
Wear was added, with a value of 4.
Added damage against Objects, set at 75.
The Shadowstalker is one of the few fully fictional weapon in the game, apart from the Flamethrower, Shadowstalker Mk.II, and Focus weapons, meaning it has no specific real-life counterpart.
However, it highly resembles the Rorsch MK1 from Battlefield 4.
Railguns exist in real life, however the only model is a gigantic weapon that will mounted on the Zumwalt-class stealth destroyer employed by the US Navy.
When fired, the character seems to pull an invisible bolt similar to bolt-action rifles.
It is one of the few weapons that comes equipped with a scope by default.
It is one of the ranged weapons without bullet drop.
Despite the ammunition being called a "rail," railguns in real life don't actually fire rails. Rather, they use electromagnetic rails in order to magnetically launch a ferromagnetic projectile forward at extremely high speeds (around 2,400 to 3,500 meters per second, much faster than an ordinary bullet).
This implies that the weapon takes "railgun" in the literal sense and uses wordplay.
Scorpion-7 had made the Shadowstalker as a modified version of similar weaponry taken out of the UFO.