Hmm... I'm pretty sure the moon has an electromagnetic field not unlike the Earth's, so magnetized boots would be able to compensate for low gravity. The question is, would you WANT to? I think it would be an advantage to be able to wear a hundred pounds of heavy armor and carry a really big gun without it weighing me down. I guess you can use the low gravity as an excuse to exaggerate weapon sizes. As I recall, gravity on the moon is about 1/6 of what it is on Earth, so weapons, armor, tools, etc, can be six times as massive on the moon.