Martial Arts is not only about just hand-to-hand combat. It uses variety of weapons such as;
# 1 Bow and Arrow
# 2 Knife
# 3 Western fencing weapons
# 4 Short staff or stick weapons
# 5 Long weapons (staff and spear weapons)
# 6 Sword
# 7 Composite weapons
# 8 "Soft" weapons
# 9 Truncheons
# 10 Sickle
# 11 Shields
# 12
brass knuckles# 13 Short range projectile weapons
# 14 Clubs
and more ...
Source:
http://en.wikipedia.org/wiki/List_of_martial_arts_weapons