...How about this one?

A concealed knife? Really?

Having one that opens up like that seems like it wouldn't be very durable. Plus it'd be harder to perform maintenance.

Hmmm... Then how about that one?

Oh look, it's detachable! Come on ma, I know how much you love sacrificing your own arm!

The responsiveness of that brand tends to be pretty poor. Not to mention we need it to be more durable.

Oh...

Remember, durability, responsiveness, and light weight are all necessities.

Aren't you being a little picky, ma?

You know, we can just keep it as a spare, you don't have to put that much thought into it.

Yes, I do.