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Chambered in 5.7x28mm, the MPA570SST features side cocker. adjustable front sight and scope mount with an 8-inch threaded barrel and 20-round polymer magazine. American-Made, it ships in its gun case and comes with a lifetime guarantee. MSRP is $699.95 (masterpiecearms.com)

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Chambered in 5.7x28mm, the MPA570SST features side cocker. adjustable front sight and scope mount with…