They're different hands for diffrent weapons you can carry.
EDIT: Yeah I saw those figures already I love the red CQB figure like the picture is awesome how the light shines on the figure and the pose It's doing is awesome. And at first I thought the white EVA was ugly but when I saw the figure picture I totally wanna get one. The Tan EOD and ODST are Badass too.
So can anyone tell me how to get the blue spartan or is that only able to be purchased at walmart if so can you buy it online cause I can't find it on the site.