Good idea on a surface level but the way the current duel works is dissimilar to other servers:
We don't choose a single weapon to request a duel or whatever
We use the same weapons we had, which means if this was implemented, the script would have to set all your current weapon ammo to 9999 and then restore it at the end of the duel, unless there's a chosen preset (For example all duels have infinite uzi instead of whatever smg you had) but no one would like that, some people like to duel with a combat shotgun instead of a sawnoff
To keep it short, I'm not sure how easy this will be to implement and how we would plan on making it work: Maybe you get to choose a weapon for every category from a menu before sending the duel request, but this would cause disagreements between players Eg:"NO DONT CHOOSE UZI I WANT TEC9, RESEND DUEL, DENY" and whatever..
but other than that, if you guys think there's an easier way to implement this, I'm all for it, +1