Krom's Canyon: Weapon Crate Locations

Location 3:
At the new-u station closest to where Krom spawns, follow the path on the right. It is behind cover.

Location 4:
This crate is behind Krom's Gatling Gun.

Location 6:
Go past the shelter containing crate 5. You will reach a dead end. Search the area for a lever that can be used. When you use it, it opens a area. Turn right when you enter the opened area. The crate is before a cliff.