I really liked armor 2.0 and how it gave us the choice to customize our gear as long as we had the glimmer and the mods. Incorporating this mechanic into weapons would also be great. Maybe you might not like this or maybe you might, but at some point in the future i think weapons 2.0 is neccesary. Lets be honest most of us here grind the game for more loot. If bungie could update all weapons to 2.0, allow us to select our perks, refresh planetary vendor weapons, and cycle the weapons in menagerie then i think it would at least refresh the game a little. Certain weapons like crucible pinnacles, exotics, and other weapons I think should be left untouched. However, your weapons that are world drops I believe should be customizable. This would not Shorten the grind. We could still play all game modes to grind for Certain weapon barrels and sights, along with magazines and different ammo types. Also the sights and scopes should be customizable. Just like the armor, we would grind for weapons that have no perks. If the stats match what you are looking for in a gun then you keep it and customize it. Plain and simple.