Lightning’s ultimate weapon is called Omega Weapon. All of the Gunblades that she can pick up can be upgraded into Omega Weapon, but they will each have different maximum stats that they can obtain depending on which base weapon was upgraded. The full list of different versions of her ultimate weapon are included below:

Base Weapon	Special Property	Maximum Strength	Maximum Magic	Upgraded Form
Blazefire Saber	-	620	620	Omega Weapon
Axis Blade	Attack: ATB Charge II	315	315	Omega Weapon
Edged Carbine	-	210	723	Omega Weapon
Lifesaber	Improved Raise II	520	520	Omega Weapon
Gladius	-	723	210	Omega Weapon
Organyx	Ironstrike	750	750	Omega Weapon
Hauteclaire	Stagger Lock	711	711	Omega Weapon
Lionheart	Quick Stagger	508	508	Omega Weapon

For more information on how to upgrade weapons or for tips on selecting the best ultimate weapon for Lightning, use the links below: