This item commemorates the 2016 MLG Columbus CS:GO Championship.
It was dropped during the All-Star match between All-Star Team America and All-Star Team Europe, and autographed by Oleksandr Kostyliev who was the most valuable player in that round.
The classic Sawed-Off deals very heavy close-range damage, but with its low accuracy, high spread and slow rate of fire, you'd better kill what you hit. It has been spray-painted with radiological warning hazard patterns.