I purchased three Tristars over the past several months. In that same spot, the C-100 and P-100 have light scuff marks on the cerakote, and my L-120 has a deeper abrasion, but only the cerakote was removed. My L-120 and C-100 have ~550 rounds through them, and the P-100 has ~400. Based on your pictures, I would be concerned/upset if the metal alloy is gouged, and I wouldn't consider that normal.