@yevgeniymak All that does is equip attachments you already have. I'm talking about unlocking new attachments in portal, which currently you cannot do so you either play Portal and have all your kills wasted because they are not counting towards progression unlocks or you have to play the main core game, with all its crap that no one wants like specialists and end of round matchmaking, oh and no server browser either, it's just quick join to some random server then when the match ends you are booted out and automatically quick joined to another random server. Not ideal when you are having fun rivalry with some players on the other team as you all just get shunted to a different random server.
