"Weapon mods" refers to modifications or alterations made to a weapon, usually in video games or for recreational purposes, that enhance its abilities or appearance. Full definition
People can also pre-order a special edition of the game, which will add some in - game content like exclusive weapons mods, a new character skin and a digital strategy map. (neowin.net)
-- Expanded loot system including new weapon mods to discover, unlock, upgrade and mix - n - match such as the glass cannon, bloodlust, bubble shield, intravenous bombs, easy money, berserker and fly paper; (digitalchumps.com)
Take into account looking for weapon mods, secret rooms, and at higher difficulty ranges and it would appear, at least for the time being, that DOOM's campaign could be sizable to say the least. (rectifygaming.com)