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The Sig MCX is built around the SIG gas-operated, short-stroke piston system. It was designed from the start to be silenced and if fully configurable for any situation. The gas system is designed to allow the shooter to increase or decrease the gas depending on the shooters needs.

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1 to 23 of 23 products

1 to 23 of 23 products

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Shop All Sig Sauer Rifles

Sig Sauer MCX SPEAR .277 SIG FURY/6.8x51mm 13" Coyote Short Bbl Rifle w/(1) 20rd Mag, SLX/SLH QD FH, & Folding Magpul Stock (NFA) RSPEAR-68-13B-NG-SBR

Sig Sauer MCX SPEAR .277 SIG FURY/6.8x51mm 13" Coyote Short Bbl Rifle w/(1) 20rd Mag, SLX/SLH QD FH, & Folding Magpul Stock (NFA) RSPEAR-68-13B-NG-SBR

Sig Sauer MCX SPEAR .277 SIG FURY/6.8x51mm 16" Bbl Coyote Rifle w/(1) 20rd Mag, SLX/SLH QD FH, & Folding Magpul Stock RSPEAR-68-16B-NG

Sig Sauer MCX SPEAR .277 SIG FURY/6.8x51mm 16" Bbl Coyote Rifle w/(1) 20rd Mag, SLX/SLH QD FH, & Folding Magpul Stock RSPEAR-68-16B-NG

Sig Sauer MCX SPEAR-LT IR 5.56 NATO 16" 1:7" Bbl IR Gen II NIR FDE Rifle w/QD Flash Hider RMCX-556N-16B-IR

Sig Sauer MCX SPEAR-LT IR 5.56 NATO 16" 1:7" Bbl IR Gen II NIR FDE Rifle w/QD Flash Hider RMCX-556N-16B-IR

Sig Sauer MCX SPEAR-LT 7.62x39 16" 1:9.5" Bbl Coyote Brown Rifle w/(1) 28rd Magazine RMCX-762R-16B-LT

Sig Sauer MCX SPEAR-LT 7.62x39 16" 1:9.5" Bbl Coyote Brown Rifle w/(1) 28rd Magazine RMCX-762R-16B-LT

Sig Sauer MCX SPEAR 7.62x51mm NATO 13" 1:10" Bbl Coyote Brown Optic Ready Pistol w/(1) 20rd Magazine PSPEAR-762-13B

Sig Sauer MCX SPEAR 7.62x51mm NATO 13" 1:10" Bbl Coyote Brown Optic Ready Pistol w/(1) 20rd Magazine PSPEAR-762-13B

Sig Sauer MCX SPEAR-LT 5.56 NATO 16" Replacement Barrel & Gas Block Assembly 8901314

Sig Sauer MCX SPEAR-LT 5.56 NATO 16" Replacement Barrel & Gas Block Assembly 8901314

Sig Sauer MCX Rattler LT 5.56x45mm NATO 7.75" 1:5" CHF Bbl Black Pistol w/(1) 30rd Mag & MCX/MPX Folding Pivoting Contour Brace PMCX-556N-7B-LT-PCB

Sig Sauer MCX Rattler LT 5.56x45mm NATO 7.75" 1:5" CHF Bbl Black Pistol w/(1) 30rd Mag & MCX/MPX Folding Pivoting Contour Brace PMCX-556N-7B-LT-PCB

Sig Sauer MCX SPEAR-LT IR 5.56 NATO 11.5" 1:7" Bbl Gen II NIR FDE Pistol w/(1) 10rd Magazine PMCX-556N-11B-IR-10

Sig Sauer MCX SPEAR-LT IR 5.56 NATO 11.5" 1:7" Bbl Gen II NIR FDE Pistol w/(1) 10rd Magazine PMCX-556N-11B-IR-10

Sig Sauer SIG MCX Rattler 5.56 NATO 5.5" Bbl Short Barrel Rifle w/(1) 30rd Mag RMCX-5B-TAP-SBR

Sig Sauer SIG MCX Rattler 5.56 NATO 5.5" Bbl Short Barrel Rifle w/(1) 30rd Mag RMCX-5B-TAP-SBR

Sig Sauer MCX Rattler LT 7.62x39mm 7.75" 1:9.5" Bbl Pistol w/(1) 28rd Mag, M-LOK Handguard, & SIG Folding Pivoting Contour Brace PMCX-762R-7B-LT-PCB

Sig Sauer MCX Rattler LT 7.62x39mm 7.75" 1:9.5" Bbl Pistol w/(1) 28rd Mag, M-LOK Handguard, & SIG Folding Pivoting Contour Brace PMCX-762R-7B-LT-PCB

Sig Sauer MCX SPEAR-LT 7.62x39 11.5" 1:9.5" Bbl Coyote Brown Pistol w/(1) 28rd Magazine PMCX-762R-11B-LT

Sig Sauer MCX SPEAR-LT 7.62x39 11.5" 1:9.5" Bbl Coyote Brown Pistol w/(1) 28rd Magazine PMCX-762R-11B-LT

Sig Sauer MCX Rattler LT 7.62X39 7.75" 1:9.5" CHF Bbl Black Short Barrel Rifle w/(1) 28rd Magazine (NFA) RMCX-762R-7B-LT-SBR

Sig Sauer MCX Rattler LT 7.62X39 7.75" 1:9.5" CHF Bbl Black Short Barrel Rifle w/(1) 28rd Magazine (NFA) RMCX-762R-7B-LT-SBR

Sig Sauer MCX SPEAR-LT 7.62x39 11.5" 1:9.5" Bbl Coyote Brown Short Barrel Rifle w/(1) 28rd Magazine (NFA) RMCX-762R-11B-LT-SBR

Sig Sauer MCX SPEAR-LT 7.62x39 11.5" 1:9.5" Bbl Coyote Brown Short Barrel Rifle w/(1) 28rd Magazine (NFA) RMCX-762R-11B-LT-SBR

Sig Sauer MCX Rattler LT 5.56x45mm NATO 7.75" 1:5" CHF Bbl Black Short Barrel Folding Rifle w/(1) 30rd Magazine & M-LOK Handguard (NFA)

Sig Sauer MCX Rattler LT 5.56x45mm NATO 7.75" 1:5" CHF Bbl Black Short Barrel Folding Rifle w/(1) 30rd Magazine & M-LOK Handguard (NFA)

Sig Sauer MCX Rattler LT 7.62X39 7.75" 1:9.5" CHF Bbl Black Pistol w/(1) 28rd Mag PMCX-762R-7B-LT

Sig Sauer MCX Rattler LT 7.62X39 7.75" 1:9.5" CHF Bbl Black Pistol w/(1) 28rd Mag PMCX-762R-7B-LT

Sig Sauer SIG MCX, 5.56 Nato, Pistol, Semi, 5.5in Bbl, NO BRACE, Al MLOK Hg, (1) 30 Rd Mag, Rattler Pistol PMCX-5B-TAP-NB

Sig Sauer SIG MCX, 5.56 Nato, Pistol, Semi, 5.5in Bbl, NO BRACE, Al MLOK Hg, (1) 30 Rd Mag, Rattler Pistol PMCX-5B-TAP-NB

Sig Sauer MCX SPEAR-LT IR .300 Blackout 9" 1:5" Bbl Gen II NIR FDE Pistol w/(1) 30rd Magazine PMCX-300B-9B-IR

Sig Sauer MCX SPEAR-LT IR .300 Blackout 9" 1:5" Bbl Gen II NIR FDE Pistol w/(1) 30rd Magazine PMCX-300B-9B-IR

Sig Sauer MCX SPEAR-LT 5.56 NATO 11.5" 1:7" Bbl Coyote Brown Pistol w/(1) 30rd Magazine PMCX-556N-11B-LT

Sig Sauer MCX SPEAR-LT 5.56 NATO 11.5" 1:7" Bbl Coyote Brown Pistol w/(1) 30rd Magazine PMCX-556N-11B-LT

Sig Sauer MCX Rattler LT .300 BLK 6.75" 1:5" CHF Bbl Black Short Barrel Rifle w/(1) 30rd Magazine (NFA) RMCX-300-6B-LT-SBR

Sig Sauer MCX Rattler LT .300 BLK 6.75" 1:5" CHF Bbl Black Short Barrel Rifle w/(1) 30rd Magazine (NFA) RMCX-300-6B-LT-SBR

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Sig Sauer MCX SPEAR 7.62x51mm NATO 16" 1:10" Bbl Coyote Brown Optic Ready Rifle w/(1) 20rd Magzine RSPEAR-762-16B

Sig Sauer MCX SPEAR 7.62x51mm NATO 16" 1:10" Bbl Coyote Brown Optic Ready Rifle w/(1) 20rd Magzine RSPEAR-762-16B

Sig Sauer MCX Rattler LT .300 BLK 6.75" 1:5" CHF Bbl Black Pistol w/(1) 30rd Mag PMCX-300B-6B-LT-PCB

Sig Sauer MCX Rattler LT .300 BLK 6.75" 1:5" CHF Bbl Black Pistol w/(1) 30rd Mag PMCX-300B-6B-LT-PCB

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Sig Sauer MCX SPEAR 7.62x51mm NATO 13" 1:10" Bbl Coyote Brown Optic Ready Short Barrel Rifle w/(1) 20rd Magzine (NFA) RSPEAR-762-13B-SBR

Sig Sauer MCX SPEAR 7.62x51mm NATO 13" 1:10" Bbl Coyote Brown Optic Ready Short Barrel Rifle w/(1) 20rd Magzine (NFA) RSPEAR-762-13B-SBR

Sig Sauer MCX SPEAR-LT IR 5.56 NATO 11.5" 1:7" Bbl Gen II NIR FDE Pistol w/(1) 30rd Magazine PMCX-556N-11B-IR

Sig Sauer MCX SPEAR-LT IR 5.56 NATO 11.5" 1:7" Bbl Gen II NIR FDE Pistol w/(1) 30rd Magazine PMCX-556N-11B-IR

Backordered – Reserve Yours