gm Posted November 9, 2017 Report Share Posted November 9, 2017 Now finally a mag made for your 300 Blackout round no longer do you need to use a standard AR mag get the correct mag now https://www.hkspecialiststore.com/product-detail?productId=1548&categoryId=10&pageSize=10&sortBy=sequence&pageNumber=15 Quote Link to comment Share on other sites More sharing options...
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