User blog comment:Gundam Legilis/Volume 1 Weapons In Depth - Gambol Shroud/@comment-186.188.108.69-20140615030602/@comment-3146930-20140616003246

Yes, Ruby used it as a slingshot so there is at least some elasticity to it. It also seems to snap back to Blake whenever it is fully extended, like if you had a small weight on a rubber band.