The Mossberg 990 Aftershock is presented as a purpose-built, modern semi-auto shotgun designed for hard use and defensive applications. Key features include an enlarged loading port, oversized controls, a gas piston system with Nickel Boron coating for reliability and ease of cleaning, and M-LOK attachment points. While praised for its robust construction and reliable operation, especially when tested dirty, the lack of an optic cut from the factory is noted as a potential drawback for a close-quarters firearm.
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