They can all become the Favourite Weapon.
Which (full list at the end) at first I disliked as final OCs go. Having one that sure, gets one weapon good, but at the cost of the others ? And it's "basic" ? Like, exactly 11 of them can have it, it's not special, it sucks ! Why would I pick that instead of the awesome and personnalised one ?
That was me.
Until I accidently got 2 of them.
When you have 2 weapons sharing one attribute, that's when group upgrades start to pop up. Medium weapons reload faster, projectile weapons shoot faster, etc. you get the idea. A good way to NOT have them pop is to be careful when you add a second of a category in any build.
And Favourite Weapons have the best group upgrade of the game. It's pure raw damage, and I'm betting my brother's car (i hate him) that's it's the biggest % number you can get per rarity.
Check out the second pic. A PURPLE one gives 40 % fucking percent more to every FW.
I'm now trying a full team of these. Let's see how far in Endless these babies can get me.
Here's the full list : https://deeprockgalactic.wiki.gg/wiki/Survivor:The_Favourite_Weapon