Grade 2: Magazines are in good to very good condition. Light signs of wear and small amounts of surface rust may be present. Magazine finish may be worn or discolored, but magazine still maintains 100% of original functionality. this means firearm was likely issued used and will show signs it has been used. Grade 2 items, if they are metal can have some rust. Its jsut the way it is. If its significant, bad and I see it, I grade it grade 3.
Grade 3: Grade 3 Magazines will show more signs of use than grade 2. More dents dings, nices, scratches, maybe rust. Magazines are fully functional though they show signs of heavy use. Surface rust or dirt may be present on floor plates, followers or body. Springs may be worn or rusty and several areas will have finish imperfections or dents. Effort may be necessary to upgrade the magazines condition.