300 People Help Michigan Bookstore Relocate Inventory In 2 Hours Owner Speaks Out After 'book Brigade' Of Goes Viral

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而且这个弹可以装在5.56的弹匣里，所以理论上m4换一个.300 blackout的上机匣就可以直接打.300 blackout了，下机匣完全不用换最后说下，如果把.300 blackout混在5.56弹匣里，是可以上膛.

300 People Help Michigan Bookstore Relocate Inventory in 2 Hours