Elden Ring Jar Cannon (HeavyBowgun) is a mod that adds the heavy bowgun to the game. The model comes directly from the unpacking file of Elden Ring. It is designed to replace the appearance of other weapons. It also includes a fluffier version. It can be found on the Mhrise Modding Wiki. You can install it on your game by following the steps on the wiki.

Note: Do not try to unpack the pak version, as the mod list does not have the file path that I added, so the unpack is not complete, you will only get model files and mdf files.