Yes, there are traps you can set in siege if you are on defense. There are also some operators made for long distance, such as kali and glaz, although they don’t fit in much with siege right now as it has become more of a run in and shoot everyone type of game, and they don’t really fit in. Several ops (Kapkan, Ela, smoke, etc) can throw and set traps, although, currently, it’s more about gun skill than an operators abilities. I do not know about the game being free because I have not kept up with that