This video details a 'Gauntlet Test' performed on a second-generation Sig MPX 9mm PCC. The test involves submerging the firearm in water, sand, dirt, and mud, followed by firing. The MPX demonstrated significant sensitivity to water, failing to fire immediately after submersion and experiencing malfunctions when water was present in the barrel or gas system. While it performed well in other elements, its water vulnerability was highlighted as a key performance limitation.
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