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 Marauder Long Sword - Entertainment Earth
Amazon.com: Vantage Nerf N-Force Toy Sword - 32 Inches Long - Nerf Foam Blade with Plastic Core - For Kids, Teens, Adults (Amazon Exclusive) : Toys & Games
I am not left-handed: Ars reviews the Nerf N-force sword | Ars Technica