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HK HK 81000584

Product Code : 642230262607

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Mfg Item #: 81000584

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MR556A1 UPPER RECEIVER 5.56MM

Barrel	16.5"
Finish	Matte Black
Caliber	223 Rem | 5.56 NATO
Rate Of Twist	1-in-7"
Additional Feature 1	Includes Bolt and Buffer
Additional Feature 2	M-Lok Handguard

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