#blackoutUnmoderated tagAll postsTrending CommunitiesSteemitCryptoAcademyNewcomers' Communityআমার বাংলা ব্লগKorea • 한국 • KR • KOSteem POD TeamWORLD OF XPILARAVLE 일상STEEM CN/中文Steem AllianceComunidad LatinaBeauty of CreativityTron Fan ClubExplore Communities...#blackoutTrendingNewPayoutsMutedammodotcom (54)in #blackout • 7 days agoHistory of 300 AAC Blackout AmmoIntroduced in 2011 by Advanced Armament Corporation, the versatile 300 AAC Blackout round was designed to optimize…