An LR300 with a carbon fiber body and handguard. I doubt the weight that was saved will make you run faster, but it's worth a shot. The magwell is skeletonized for even less weight....

An AK74u with a carbon fiber handguard. I doubt the weight that was saved will make you run faster, but it's worth a shot....

Well... I guess it's not a metal facemask anymore. This, is much lighter, though I doubt it will make you run any faster. Now instead of metal, your facemask can be made out of carbon fiber; who really knows how safe that is though......

Well... I guess it's not a metal chestplate anymore. This, is much lighter, though I doubt it will make you run any faster. Now instead of metal, your chestplate can be made out of carbon fiber; who really knows how safe that is though......