There are hundreds of real money slots games that US players can enjoy. It is impossible to determine the probability of winning in a particular slot only by just looking at it. All slots have a lot in common, but each of them has its own RTP and payout statistics.
The optimal structure of the slot machine is characterized by RTP over 95%, five reels and many betting lines with the possibility to change their number. You should pay attention to online slots, which have additional bonus features. Among them are special symbols (scatter and wild), as well as bonus rounds which will let you win more often.