It is the one of the weapons that blocks and deals damage. The other one is the Kingsman Umbrella. The Lightsaber is the third melee weapon in Battle Royale. The closest Save the World item is the Vindertech Smasher.
There are 4 versions of this weapon: Blue (Rey’s), Green (Luke’s), Red (Kylo Ren’s) and Purple (Mace Windu’s), but the differences are purely cosmetic.
Lightsabers were unvaulted temporarily from May 2nd to May 5th 2020, during Chapter 2 Season 2 to celebrate the Star Wars Day.
When you opponent is blocking with their Lightsaber, use a fast-firing weapon like a Submachine Gun or a Minigun to break the your opponent's block. Or much effectively, use explosive weapons like Grenades and Rocket Launchers.