This rifle The Touch of Malice is from the game Destiny (PlayStation). It's really hard to obtain in the game; you have to collect parts from various areas, planets, moons, raids and missions.

I made it before an in-person meetup with our clan-mates.
While making it, there was a moment when I wondered ,what I was thinking, it’s not a weapon that’s meant to exist outside the game. There’s a floating part (fishing line and tiny transparent beads used for stabilization).