You start with a revolver, then get a glock that seems to mostly be a lateral move, and then you get a machine pistol which sounds better but is actually much worse because individual bullets deal way less damage and it’s way harder to line up headshots.
My first issue is that your starting weapon doesn’t have a clear trajectory. You start out at rank 1 and each rank has a different arena battle associated with it, including your starting weapon. It’s thorough but standard arena gameplay: You fight in a small enclosed space against a bunch of enemies who are split up into different teams, some wild animals get mixed in, you have to be the last one standing, you start with a pre-defined weapon but can loot more from defeated enemies. Far Cry 4 has an arena that you reach about a third of the way through the game.