Uploading a mod that contains assets taken from another user without permission or credit. This happened immediately after you received a formal warning for taking other content from the same user.
The mesh used in "Arsenal Weapon Overhaul - Cowboy Repeater (KF2)" at \meshes\weapons\Winchester M1894\La Longue Carabine.nif is almost an exact match for the one created by Prinkertop/Marcurios in their (deleted) mod "La Longue Carabine Moddable" at \meshes\weapons\2handrifle\cowboyrepeaterunique.nif.
"Submission of existing user-submitted content without obtaining permission from the original author(s) of said content is strictly prohibited."
This member received 0 informal warnings and 1 formal warnings before they were banned