I've thought of a new idea of adding another room in spar that allows the 2 players that joined to have the same gun which makes the match fair. When you join the guns the players get will just be random but it wouldn't be added to your inventory. It'll just be used for the Match and then removed. This can be used when players want to series and can both use the same guns to even things out.
There are probably some flaws in this but I think it's a great idea and should be added to the game. Any flaws can be fixed and improved.