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Mfg Item #: 81000584
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HK MR556A1 Complete Upper Receiver, 223 Remington/556NATO, 16.5" Cold Hammer Forged Barrel, Black, M-Lok Free Float Rail, Flash Hider, Complete MR556 Bolt Carrier Group, Proprietary Tungsten Buffer, Proprietary Buffer Spring 81000584
| Shipping Width | Y |
|---|---|
| Shipping Length | 8.00 |