MA5B in Halo 3

New features:

- faux-PBR (courtesy of ChunkierBean's guide);

- uses upscaled textures from MCC (thanks Halo Archive);

- uses greatest assault rifle sound of all time (Halo reach);

- 15 round per second firing rate and 60 round magazine, just as the forerunners intended;

- modified SMG chud (with new reticle);