A Gundam piloted by Setsuna F. Seiei, the GN-001 Gundam Exia is designed for melee combat, with several swords, blades, and arm shields. It was later commented in the series that the Exia is equipped with a solid metal blade in order to have the ability to cut through GN particle fields.
I could continue on with the technicalities, but that would make this review boring and inappropriate compared to how awesome this cosplay is. It must have taken weeks to make this Gundam. Very nicely done!