Board Thread:Speculation House/@comment-26039386-20151207052048/@comment-25396609-20151207061224

The weight is easily explainable, carbon fiber components paired with lighter than steel alloys can cut the weight of a weapon to as little as 1/3 the initial mass. As for magic, Remnant has does not have literal amgic, it has pseudo magic. Aura is more akin to Ki than to mana, while Dust is somehwhat like mana but closer to Materia (which Monty pretty specifically compared it to) another form of pseudo magic.