The assault rifle is located within 2 - 1. I can't remember exactly where you find the broken assault rifle, but there's a small passage near the end of 2 - 1 located just above the end point where you'll find a Repair Kit that you can combine with it at the workbench to create the fixed assault rifle.I need to learn Japanese yesterday....
P.S Why do I need THREE BUDDHA STATUES TO MAKE THE ARMOR!!! And just in case, where's the Assault Rifle?
EDIT: WHAT THE HECK HAPPENED TO HYAKI'S THIRD CHEST!!??
No idea on the buddha statues...
Yeah, she does that. Don't know why but uh, she just decides that bonding isn't for her I guess.