M1 Carbine 15 round mag marked Circled B by Bridgeport Metal Goods
Grade 1 = Excellent, unissued condition with no dents or scratches. May come in original wrap.
Grade 2 = Excellent condition with only minor scratches from storage or very minor use.
Grade 3 = Very Good condition with only very minor dents, minor scratches, or very minor surface rust.
Grade 4 = Good condition with minor dents, deeper and/or more scratches, or slight rust or pitting.
Grade 5 = Fair condition with dents that may affect function and major rust or discoloration.