I've noticed how little weapons are there on Halo Reach's maps.
Compared to Halo 2 and 3, and to a lesser extent CE, the maps are pretty bare if you're looking for a weapon pick up. Seems like that design carried over to Halo 4, 5 and Infinite. You're meant to run out of ammo and die in post 3 Halo.

>>712565174
Back then people tought rock tunnel would be straightforward without basement tards to distract him