You had the ability to move fast while scoped with it (150 hu/s) making it the most powerful weapon of the game, the animations were a bit different in 2012 (the draw, and fire animation were a bit different), as the other guns in 2012 you had to wait until the reload animation was done instead of waiting until the clip was inserted.
For those wondering I've re-added the old model with its animations, stats and sounds into the current CS:GO version in order to compare, this isn't the 2012 build of CS:GO.
This video is par of my "Anyone remember the old" serie:
• Anyone remember the old...