This review of the Mossberg 990 Aftershock, presented by Brass Facts, highlights its performance as a gas-operated, semi-automatic 12 Gauge shotgun. The analysis, conducted with high-round count stress testing, reveals significant reliability issues, particularly extraction failures, and a pickiness with ammunition. While compatible with some aftermarket parts like the Magpul SGA stock, it struggles with cheaper loads, making it less versatile than some competitors. The review emphasizes a critical, data-driven approach to understanding the firearm's limitations.
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