The best assault rifle in Fortnite is going to come down to personal preference. That said, I have a few picks that I think a good number of players would agree with. The first of these is the drum gun. The drum gun is the OG weapon that I dominated with in battle royale. When I was first learning the ropes and had no idea how to build, the drum gun helped me get victory royales. This is due to its nature of being a machine gun in a way. It has the speed of the SMG mixed with the range and utility of an assault rifle. This is a perfect blend of what I needed at the time. Even today when the drum gun appears in Fortnite, it is still a go-to gun of choice. On the other hand, there is another assault rifle that I think is better, though. It might be controversial but I think that the MK-Seven AR is one of the best in the business. It is fairly new, only releasing in Chapter 3, Season 1. However, it quickly became one of my favorite weapons of all time. The MK-Seven is capable of aiming down the sights, which few ARs can do. Couple this with the intense accuracy, decent fire rate, and powerful damage, and you have an amazing gun. I am able to go without a sniper rifle with this gun in battle. It is the best gun, in my opinion, for mid and long-range fights. The drum gun and the MK-Seven are the best two assault rifles in Fortnite.