I made this mod bec there wasnt another similar to mines << adding a new artillery >> and because the vanilla artillery mesh sucks !!!!!! You can find the Abram artillery in the same section with the vanilla in workshop menu, i have created 2 Abrams tanks one with black camo and one with brown camo.....also i changed the safety bonus from 6 =====> 10 !!!!  you must assign a settler but due to some limitations the settler will not sit onto the tank but he will wonder in the settlement, he will have the icon that he is assigned...... the animations of turning the artillery are blocked but the artillerys time fire is the same with the vanilla so be patient !!!!