I have a 15-22 A1 DUA. No mark or star or anything on the manual. DOES NOT MATTER. SHOOTS FLAWLESSLY.ALL BRANDS. Does not care. Clears out every magazine with out a problem. Have somewhere near 1000+ rounds fired so far. NOT 1 PROBLEM. Field strip it and bore snake it and clean it after every 250 rounds or so. Love this gun! Just need to get a few accessories now.
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