I have got 4 special pistols and 2 tanks,can I get them again?
In a week from now
new twtich drop man,just look at the news
Oh sorry,I just found that I can’t get the twich drop twice. 
Got this from community manager:
I suppose so, all previously earned drops are returning to the accounts at some point, dont see why they wouldnt stack
But cant confirm 100%, I frankly don’t have the time to dig deeper right now