5.56MMx45
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Heckler & Koch MR556 75th Anniversary 5.56 16.5″ Tan (4) 30rd 5.56mmx45 Semi-Auto Rifle 16.5″ Barrel 30-Rounds
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Heckler & Koch MR556 A4 5.56 16.5″ OR 10-rd 5.56MMX45 Semi-Auto Rifle 16.5″ Barrel
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Heckler & Koch MR556 A4 5.56 16.5″ OR 30-rd 5.56MMx45 Semi-Auto Rifle 16.5″ Barrel
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