Gnar Rapid Fire Build

One of my favorite things to do with Gnar (because of his Hyper passive) is to demolish everything with just his auto-attacks. Here is the build I normally use (not in any specific order):

Runaan's Hurricane- Gives 70% bonus attack speed and, upon basic attacking, fires bolts at 2 other enemies near the target that apply on-hit effects (including Hyper).

Nashor's Tooth- Gives 50% bonus attack speed and 60 Ability Power. Also gives 20% cooldown reduction and a unique passive that causes both Gnar's attacks and Runaan's bolts to deal extra magic damage on-hit.

Zephyr- Grants 10% movement speed and cooldown reduction, 25 Attack Damage, and another 50% attack speed. Also has the Tenacity passive. By now you should nearly be at max attack speed.

Banshee's Veil- Now time to start building to withstand damage as well as dish it out. Gives 450 max health, 55 magic resistance, and a unique shield that blocks the first enemy ability used on you. Also grants 45 health regen per 5 and up to 10 seconds upon taking damage from an enemy champion or when the shield breaks.

Warmog's Armor- Grants 1000 max health and a unique passive that gives you bonus health regen per 5 seconds equal to 1% of your maximum health. (I like to build Zac with 6 of these. :) )

OR Boots of Swiftness/Sorcerer's Shoes- Either of these boots would be OK. Swiftness would be great for making sure you can escape more easily if you manage to get into a bad position, while Sorcerer's will allow you to bypass some of the Magic Resistance your enemies have inevitably built to stop your onslaught.

And if you feel this would be better, you can replace one or two of the items with these:

Rabadon's Deathcap- Gives 120 Ability Power, as well as a unique 30% boost to your Ability Power. This will allow your Hyper Passive to MURDER!!!

Ravenous Hydra- Grants 75 Attack Damage, 15 health regen per 5 seconds, and 12% Life Steal that only applies to damage dealt by this item. This meaning that it only restores your health from its active, which damages nearby enemies, and its passive, which causes basic attacks to damage enemies near the target. This passive doesn't work in Mini form, but does in Mega form, giving it a little added boost.

Hextech Gunblade- Grants 45 Attack Damage, 65 Ability Power, 12% Lifesteal, and a unique 20% Spell Vamp. This item easily allows you to stay in the middle of combat, constantly restoring your Health with each basic attack.