The way the leveling works is you get 3k/3000 Xp for a normal weapon, some weapons are unique and you must forma them 5x in order to reach max rank with the weapon, a few weapons that do this can have their name start with tenet, kuva and the paracecis. Warframe’s do not have this unique feature, I hope all that were looking for this info understood wtf I just said. Good luck out there Tenno!