N-Force is a series of Nerf foam weapons that was released in 2009 to 2011. Until now, I still think that no any NERF foam weapons can surpass the N- Force series! :
Nerf N-Force Vendetta Double Sword – Blaster Barn
Nerf N-Force Marauder Long Sword | As They Grow Up
Everything You Need to Know About Nerf Swords • Sword Encyclopedia
I am not left-handed: Ars reviews the Nerf N-force sword | Ars Technica
Nerf Zombie Strike Strikeblade Sword #10016568
Nerf N-Force Marauder Long Sword - Entertainment Earth
Amazon.com: NERF N-Force Vendetta Sword (Discontinued by manufacturer) : Toys & Games
DAMAGED Nerf N-Force Marauder Form Sword Yellow Black 40" Cosplay Broadsword | eBay