Sig Sauer UAMCXASURG MCX SURG Upgrade Kit Complete Upper, 5.56x45mm NATO 11, FDE, Adj. Gas Piston, M-LOK SD Handgaurd, Fold Stock Assembly with Adapter Kit, Direct Thread Suppressor (*NFA Item*) with Removable Heat Shield, Fits AR-15 Lower

Overview

The Sig Sauer MCX-SURG Upgrade Kit is a complete suppressed upper receiver group engineered to meet USSOCOM specifications as a drop-in upgrade for standard M4A1 lower receivers. Chambered in 5.56x45mm NATO, it features an 11.5-inch cold hammer-forged carbon steel barrel with a chrome finish and an anodized Flat Dark Earth receiver and handguard finish. The assembly includes a direct-thread Inconel suppressor with a titanium heat shield, a reduced blowback design, a lightweight low-profile handguard, an SD handguard with a removable titanium cage, a folding stock assembly with an adapter kit, and a 1/2"x28 thread pattern.

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