AR6s are 86mm underfoot, so they wont fit without some tweaking. You can take them to the shop to get mounted and they'll either tweak them out or they might be able to trade you for some wider brakes.
What size AR6s do you have because only the 181s have 86 underfoot. Each model size below drops by 1, i.e. 176 have 85, 171 have 84. But either way 85mm brakes will fit fine on 86 with a minor bend.
I don't have them yet but I plan on getting 171 or 176 I'm happy that the binding will fit =) i'm pretty broke and can't afford new binding lol Thanks !