How do I purchase the Wild West event "DEFECTOR" offer in the shop? She doesn't appear to me. I want to switch factions, but I can't. Can someone help me?

Since we are in the current scenario of the game, where the turrets have several Augments (some even disproportionate to the others), why don't you make a special Augment in Shaft, where shooting in sniper mode, damages all rivals in the line of fire, with strong impact force, how was it in 2015?