I tried polishing over the damage but it just gets worse. Ill just have the shop replace it

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A5 basic, polished internals :: E-grip (W.A.S. board) :: M249 SAW stock :: 14" J&J ceramic barrel :: low-profile X7 hopper :: Pure Energy remote line w/ slide check :: Pure Energy 48CU / 3000psi tank :: Flurry Industries Ultraback Emissary vest olive :: OPSGEAR specops gloves :: V-Force Grill reverse olive