In all that explain to me where the crime is in at least making it an option to change it from the menu maybe. We can already add skulls. Hurr durr grunts didnt exp0De. That breaks cann0n!
Brrrrr What? Confetti, that unrealistiC, grunts didnt haz confetti!
Aesthetics and appearance > Cannon
Posted by: the omega man117
http://www.halopedian.com/MA5B
Read that entire page, even the info box to the far right. It describes some aspects of its appearence. That includes length which is obiously different than the MA37. Also the MA5K, which is featured in a few books, is based off the MA5B. On the front cover of Ghosts of Onyx you can see a MA5K. It looks like a smaller version of a MA5B and that is exactly what it is. If the MA5B looked like the MA37, then wouldn't the MA5K look like it aswell?
There is also several comics and Halo Legends videos that show the MA5B as it appears in Halo 1. If they changed it then they would have to find some logical reason why they did. There is none.
EDIT: Oh, and I forgot Halo Wars. Want to explain that one also?