system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel X-23] How much do Laura's forearms weigh?

Logan is buff partially because he's carrying around a heavy metal skeleton but Laura only has the claws. Does she have weirdly strong arms or do the claws not weigh much?
gpt
Adamantium is a strong metal but it's also light. Wolverines bone weight literally only added 100lbs to his overall weight (going from 240lb to 340lbs. If you factor in he's a fully grown male, that's even distribution across his body, it's not that much weight on his arms. 

The same would apply for claws. I'd say conservative estimate is 1lb per claw which we can say for Laura. As such, her forearms only have 2lbs extra weight. It really isn't much.