um sry to disappoint ure guide but
super magum gives a bit more accuracy compared to the regular l9 and DOES NOT kill an enemy in one hit ALL the time. i have been using it for 8 days and i think it has better accuracy and lower spread than the l9 arctic. also from what i hear arctic has a bt more accuracy and faster reload time compared to the regular and the ghilie gives a faster RoF compared to the regular l9.