Ok, I don't know how late I am about this, but I thought since no one else said anything, I'll say it. I haven't been playing a lot of AW because I don't own it anymore. After my recent purchase of a PS4, I lost AW, but would still rent it every now and then. I just rented it yesterday, and saw that the weapons are now in AW for PS4 players. I haven't gotten to use them because I haven't gotten them in supply drops, though. Although, I DID get my first legendary thing (the Carnavale mask thingy). Anyways,that was all.
UPDATE: Like I said with the M1 Irons, literally EVERYONE is using them.