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The .300 AAC Blackout (designated as the 300 BLK by the SAAMI and 300 AAC Blackout by the C.I.P.), also known as 7.62×35mm is an intermediate cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine. Its purpose is to achieve ballistics similar to the 7.62×39mm cartridge, or even more similarly, the 7.92×33mm Kurz cartridge in an AR-15 while using standard AR-15 magazines at their normal capacities. 300 BLK ammunition cannot be used in a rifle chambered for 7.62×40mm Wilson Tactical.

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  1. nammac

    Silencerco Omega 9K - Is it worth it?

    So, being that those whom have been elected to serve us are confused and think of us as their servants and serf’s, I’ve decided to bite the bullet and invest in my first can. My Requirements: - Compact (want to keep it as close to 6” mark as possible) - Must handle 9mm and .300 Blackout - Can’t...
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