Why do they call it an "arms" race?

[her209]

When its clear its more than just guns and ammo.

 

[HamburgerBoy]

Your question would make sense if "they called it" a firearms race.

 

[Raizinman]

A legs race is already taken.

 

[pontifex]

Your question would make sense if "they called it" a firearms race.

this

 

[destrekor]

what are we talking about here?

arms, as in "arms race," refers to armaments