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Sig Sauer MCX Spear for Sale

Founded: 1976

HQ: Switzerland and Germany

The Sig Sauer MCX Spear is a semi-automatic rifle with a short-stroke gas piston, featuring a multi-caliber interchangeable-barrel system and the .277 Fury (6.8×51mm) caliber. Its non-reciprocating left-side charging handle works alongside a standard rear handle for versatile manipulation. Over 64 Sig Sauer MCX Spear auctions have run on FirearmLand. On FirearmLand, Sig Sauer MCX Spear listings most often appear in 5.56 NATO and 7.62x51mm NATO.

Sig Sauer MCX Spear Auctions

2 active auctions ending soon

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Coyote Short-Stroke Piston +BIPOD

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Coyote Short-Stroke Piston +BIPOD

Sig Sauer MCX-SPEAR LT 556 MDT Carbon-Fiber Bipod

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Coyote BUFFERLESS PISTON SYSTEM

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Coyote BUFFERLESS PISTON SYSTEM

Sig Sauer MCX-SPEAR LT 556 SIDE-FOLDER

Recently Sold

Sig Sauer MCX-SPEAR LT Pistol 5.56 NATO 11.5" Coyote Tan BUFFERLESS +3 MAGS

Sold On 08/14/2026

Sig Sauer MCX-SPEAR LT Pistol 5.56 NATO 11.5" Coyote Tan BUFFERLESS +3 MAGS

Sig Sauer MCX-SPEAR LT SIDE FOLDER BRACE, PISTON

DESIRED Sig Sauer MCX-SPEAR 277 SIGFURY (6.8X51Mm) FURY 16" Tan

Sold On 08/14/2026

DESIRED Sig Sauer MCX-SPEAR 277 SIGFURY (6.8X51Mm) FURY 16" Tan

Sig Sauer MCX-SPEAR NGSW M7 Lineage FOLDER

Sig Sauer MCX-SPEAR LT Pistol, IR 300 Blackout 9" FDE +4 MAGS & ORIG BOX

Sold On 07/31/2026

Sig Sauer MCX-SPEAR LT Pistol, IR 300 Blackout 9" FDE +4 MAGS & ORIG BOX

Sig Sauer MCX-SPEAR LT Short-Stroke Piston FOLDER

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Two-Tone FDE & Black GEISSELE TRIGGER

Sold On 07/29/2026

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Two-Tone FDE & Black GEISSELE TRIGGER

Sig Sauer MCX-SPEAR LT FOLDER Short-Stroke Piston

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Coyote Tan Fires Folded ERGO GRIP

Sold On 07/24/2026

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Coyote Tan Fires Folded ERGO GRIP

Sig Sauer MCX-SPEAR LT 556 Short-Stroke Piston

Sig Sauer MCX-SPEAR 7.62 NATO 16" Coyote Tan Short-Stroke Piston +ORIG BOX

Sold On 07/08/2026

Sig Sauer MCX-SPEAR 7.62 NATO 16" Coyote Tan Short-Stroke Piston +ORIG BOX

Sig Sauer MCX-SPEAR 762 Side-Charging M-LOK

Sig Sauer MCX-SPEAR 7.62 NATO 16" FDE Coyote Tan PISTON, THREADED

Sold On 06/24/2026

Sig Sauer MCX-SPEAR 7.62 NATO 16" FDE Coyote Tan PISTON, THREADED

Sig Sauer MCX-SPEAR 762 U.S. Army M7 Lineage

Sig Sauer MCX-SPEAR LT 5.56 NATO 11.5 Coyote Tan THREADED +2 MAGS

Sold On 06/22/2026

Sig Sauer MCX-SPEAR LT 5.56 NATO 11.5 Coyote Tan THREADED +2 MAGS

Sig Sauer MCX-SPEAR LT 556 Short-Stroke Piston

Sig Sauer MCX-SPEAR LT SBR 300 Blackout 9" Coyote & Black THREADED, FOLDER

Sold On 06/09/2026

Sig Sauer MCX-SPEAR LT SBR 300 Blackout 9" Coyote & Black THREADED, FOLDER

Sig Sauer MCX-SPEAR LT Short-Stroke Piston

Sig Sauer MCX-SPEAR LT 7.62x39 16 Coyote Tan Short-Stroke Piston +3 MAGS

Sold On 06/05/2026

Sig Sauer MCX-SPEAR LT 7.62x39 16 Coyote Tan Short-Stroke Piston +3 MAGS

Sig Sauer MCX-SPEAR LT FOLDER

Sig Sauer MCX-SPEAR SBR 7.62 NATO 13" Coyote Tan Short-Stroke Piston

Sold On 05/19/2026

Sig Sauer MCX-SPEAR SBR 7.62 NATO 13" Coyote Tan Short-Stroke Piston

Sig Sauer MCX-SPEAR SBR

Sig Sauer MCX-SPEAR 7.62 NATO 16" Coyote Tan Short-Stroke Piston +2 MAGS

Sold On 05/15/2026

Sig Sauer MCX-SPEAR 7.62 NATO 16" Coyote Tan Short-Stroke Piston +2 MAGS

Sig Sauer MCX-SPEAR 762 XM7 Lineage FIRES FOLDED

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Coyote SHORT-STROKE PISTON +ORIG BOX

Sold On 05/01/2026

Sig Sauer MCX-SPEAR LT 5.56 NATO 16" Coyote SHORT-STROKE PISTON +ORIG BOX

Sig Sauer MCX-SPEAR LT Side-Folder M-Lok MAGPUL

Sig Sauer MCX-SPEAR LT 5.56 NATO 11.5" Threaded SHORT-STROKE PISTON +PMag

Sold On 04/24/2026

Sig Sauer MCX-SPEAR LT 5.56 NATO 11.5" Threaded SHORT-STROKE PISTON +PMag

Sig Sauer MCX-SPEAR LT 556

Sig Sauer MCX-SPEAR LT 7.62x39 16" Coyote Tan +ORIG BOX

Sold On 04/08/2026

Sig Sauer MCX-SPEAR LT 7.62x39 16" Coyote Tan +ORIG BOX

Sig Sauer MCX-SPEAR LT 762 Side-folding Stock

Sig Sauer MCX-SPEAR LT 5.56 NATO AR15 AR-15 16" FDE +2 MAGS & ORIG CASE

Sold On 04/08/2026

Sig Sauer MCX-SPEAR LT 5.56 NATO AR15 AR-15 16" FDE +2 MAGS & ORIG CASE

Sig Sauer MCX-SPEAR LT AR15 AR-15 556

Sig Sauer MCX SPEAR LT 300-Blackout 8.5" Coyote Tan

Sold On 03/27/2026

Sig Sauer MCX SPEAR LT 300-Blackout 8.5" Coyote Tan

Sig Sauer MCX SPEAR LT 300-BLK-AAC 300BLK PDW

Sig Sauer MCX-SPEAR 7.62 NATO 16" Coyote Tan Free-float M-LOK Tactical

Sold On 03/20/2026

Sig Sauer MCX-SPEAR 7.62 NATO 16" Coyote Tan Free-float M-LOK Tactical

Sig Sauer MCX-SPEAR 762 Suppressor-Ready Defense

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Sig Sauer MCX SPEAR LT 5.56 NATO 16" Coyote Tan Tactical Defense Rifle

Sold On 03/18/2026

Sig Sauer MCX SPEAR LT 5.56 NATO 16" Coyote Tan Tactical Defense Rifle

Sig Sauer MCX SPEAR LT 556 SpearLT Folding Stock

LIKE-NEW Sig Sauer MCX-SPEAR 7.62 NATO 16" Tan

Sold On 03/11/2026

LIKE-NEW Sig Sauer MCX-SPEAR 7.62 NATO 16" Tan

Sig Sauer MCX-SPEAR 762 Magpul Folding Stock

Sig Sauer MCX-SPEAR LT 5.56 NATO 16 Coyote Brown Gas-Piston

Sold On 03/06/2026

Sig Sauer MCX-SPEAR LT 5.56 NATO 16 Coyote Brown Gas-Piston

Sig Sauer MCX-SPEAR LT 556 5.56X45

Sig Sauer MCX-SPEAR LT 300 Blackout 9" Coyote Tan Sporting Defense Pisol

Sold On 01/30/2026

Sig Sauer MCX-SPEAR LT 300 Blackout 9" Coyote Tan Sporting Defense Pisol

Sig Sauer MCX-SPEAR LT 300-BLK-AAC SpearLT Target

Sig Sauer MCX-SPEAR LT 300 Blackout 9" Coyote Tan Defense Target Pistol

Sold On 01/23/2026

Sig Sauer MCX-SPEAR LT 300 Blackout 9" Coyote Tan Defense Target Pistol

Sig Sauer MCX-SPEAR LT 300-BLK-AAC Target Sporting

Sig Sauer MCX-SPEAR 7.62 NATO 16" Coyote Brown +4 MAGS & ORIG BOX

Sold On 01/21/2026

Sig Sauer MCX-SPEAR 7.62 NATO 16" Coyote Brown +4 MAGS & ORIG BOX

Sig Sauer MCX-SPEAR 762 XM7 NGSW M-LOK

LIKE-NEW Sig Sauer MCX SPEAR LT 5.56 NATO 16" AR15 AR-15 +3 MAGS & ORIG BOX

Sold On 01/02/2026

LIKE-NEW Sig Sauer MCX SPEAR LT 5.56 NATO 16" AR15 AR-15 +3 MAGS & ORIG BOX

Sig Sauer MCX SPEAR LT 556 AR15 AR-15 Gas-Piston

Sig Sauer MCX-SPEAR 7.62 NATO 13" Coyote XM7 Suppressor-Ready +3 MAGS

Sold On 12/22/2025

Sig Sauer MCX-SPEAR 7.62 NATO 13" Coyote XM7 Suppressor-Ready +3 MAGS

Sig Sauer MCX-SPEAR 762 Gas Piston Defense

USA MADE Sig Sauer MCX-SPEAR LT 7.62x39 16" Coyote Anodized +4 MAGS

Sold On 12/03/2025

USA MADE Sig Sauer MCX-SPEAR LT 7.62x39 16" Coyote Anodized +4 MAGS

Sig MCX-SPEAR LT 762 M-LOK

Sig Sauer MCX SPEAR 7.62 NATO 16" Coyote Anodized XM7 +GEISSELE TRIGGER

Sold On 10/01/2025

Sig Sauer MCX SPEAR 7.62 NATO 16" Coyote Anodized XM7 +GEISSELE TRIGGER

Sig Sauer MCX SPEAR 762 Folding Stock

Sig Sauer MCX SPEAR LT 5.56 NATO 16" Coyote FDE AR15 AR-15 +5 MAGS

Sold On 09/22/2025

Sig Sauer MCX SPEAR LT 5.56 NATO 16" Coyote FDE AR15 AR-15 +5 MAGS

Sig Sauer MCX SPEAR LT 556 Folding Stock AR-15 AR

Sig Sauer MCX Spear LT Gen 3 5.56mm NATO (.223 Rem.) 18" +2 MAGS

Sold On 09/19/2025

Sig Sauer MCX Spear LT Gen 3 5.56mm NATO (.223 Rem.) 18" +2 MAGS

Sig Sauer MCX

Sig Sauer MCX SPEAR LT 5.56 NATO 16" Coyote FDE +2 MAGS

Sold On 09/12/2025

Sig Sauer MCX SPEAR LT 5.56 NATO 16" Coyote FDE +2 MAGS

Sig Sauer MCX SPEAR LT 556

Sig Sauer MCX-SPEAR .277 SIG Fury AR-10 AR10 16" 6.8x51mm

Sold On 08/20/2025

Sig Sauer MCX-SPEAR .277 SIG Fury AR-10 AR10 16" 6.8x51mm

Sig Sauer MCX-SPEAR AR-10 AR10 XM7 XM-7

Sig Sauer MCX SPEAR LT 5.56 NATO AR-15 AR15 16.0" Coyote

Sold On 08/13/2025

Sig Sauer MCX SPEAR LT 5.56 NATO AR-15 AR15 16.0" Coyote

Sig Sauer MCX SPEAR LT 556 AR-15 AR15

Sig Sauer MCX SPEAR LT IR 300 Blackout +ORIG BOX

Sold On 07/04/2025

Sig Sauer MCX SPEAR LT IR 300 Blackout +ORIG BOX

Sig Sauer MCX SPEAR LT IR 300 AAC

Sig Sauer MCX Spear LT 7.62x39 16" Coyote Tan +2 MAGS

Sold On 07/02/2025

Sig Sauer MCX Spear LT 7.62x39 16" Coyote Tan +2 MAGS

Sig Sauer MCX Spear LT

Sig Sauer MCX Spear 7.62 NATO AR15 16.5" Coyote Tan

Sold On 06/30/2025

Sig Sauer MCX Spear 7.62 NATO AR15 16.5" Coyote Tan

Sig Sauer MCX Spear

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