The requirements for this trophy is to complete the optional sidequest
To Arms! given to you by the People's Liberation Army.
This mission is a little lengthy and tedious purely because it requires you to collect 50 common (white) weapons and deposit them in a mailbox, as well perform a few side objectives throughout the process.
You pick up the mission in
Triton Flats area from the bulletin board, and the mission itself is a level 11 quest.
The rewards in Normal Vault Hunter Mode are:
-$70,
-1363 XP and the
-
Support Relay http://borderlands.wikia.com/wiki/Support_RelayOverall this quest is not complicated, its just a bit of a pain because when you receive it, your storage deck is probably not upgraded very high, meaning you can't hold a ton of weapons. Mine was at 18 items to be held upon completion of this, and I was also holding some weapons to swap out depending on the type of enemies I was fighting.
Also its not really worth it to buy common level weapons, as they tend to cost about $1,200 on average when you are in the level 18-ish range.
My best advice for this quest is:
-sell off or store any unnecessary weapons that are green value or higher
-check every storage locker or weapon crate you pass by and take all white weapons seen
-smash every rock or destroyable item that contains items
-kill large groups of enemies to check for white weapons
-invest in upgrading your Storage Deck with moonstones
Note: Only white
guns count, not grenade mods, Oz kits, shields or class mods. The type of gun does not matter, they all count towards the 50 requirement.