This rules of this game are designed to be smooth and easy to use and not in the way of roleplay and that works here because this is a mystery solving game, not an action game (even though the game have actions scenes sometimes). A crunchier game would have more detailed weapon stats but that is not needed in this game. All the weapon stats and features are listed in the weapon lists and that's it. You could say that what the weapon is and how what it looks like are all built in into those stats.
“Thanks for noticin' me.” - Eeyore