This review of the SIG MCX 300 Blackout Integrally Suppressed Upper from SHOT Show 2018 highlights its modular handguard system, which is zeroable for accessories. The upper features a 6.75-inch barrel with a pinned and welded 19-baffle titanium suppressor, making it a 'one-stamp' NFA item. The modularity also allows for a barrel swap to 5.56 NATO.
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![[SHOT 2018] SIG MCX 300 Blackout Integrally Suppressed Upper](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FJaeuAnTT_dQ%2Fhqdefault.jpg&w=3840&q=75)
