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Heckler & Koch G3 Heckler & Koch G36 Heckler & Koch PSG1 Heckler & Koch Heckler & Koch MP5 Heckler & Koch HK416 Heckler & Koch UMP Heckler & Koch G11 Heckler & Koch HK21 Heckler & Koch USPTài liệu tham khảo
WikiPedia: Heckler & Koch UMP http://hkpro.com/index.php?option=com_content&view... http://hkpro.com/index.php?option=com_content&view... http://photos.imageevent.com/smglee/cltactical/HK%... http://www.youtube.com/watch?v=3hSimmdwED4 http://www.youtube.com/watch?v=zNjdrtbrbqo http://www.heckler-koch.de/HKWebText/detailProd/19... http://www.kerensky.net/pdf/ump_man.pdf http://www.nazarian.no/wep.asp?id=309&group_id=4&c... http://world.guns.ru/smg/de/hk-ump-e.html https://web.archive.org/web/20041021063832/http://...