Power Gems - The world of Heavy Arm works on power gems! Mined from Mineral Mines, power gems is the source of all power. From small to large, a power gem's power depends on it's size; the bigger the powerful. Some organizations have condenced it's power in small gems. Weapons of GUNS and other organizations put power gems inside weapons, clothing or implant them in human bodies to make an individual stronger. The only known way of disabling a power gem is to damage it's core! Through Max's journey, Power Gems can be acquired to customize and make weapons stronger.