The CMMG MK57 Guard in 5.7x28mm offers a unique AR-15 platform experience, leveraging FN Five-seveN magazines and CMMG's effective Radially Delayed Blowback system. It excels with suppression, demonstrating significantly reduced noise levels. The firearm proved accurate out to 300 yards despite minor scope mount issues, making it a compelling option for pistol caliber carbine enthusiasts.
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