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Sig Sauer MPX-K for Sale

Founded: 1976

HQ: Switzerland and Germany

Sig Sauer MPX-K is a compact pistol with a hammer-fired, short-stroke gas piston, closed-bolt semi-automatic action and a 4.5-inch K-length barrel, chambered in 9×19mm Parabellum. Its hallmark is a suppressor-friendly short-stroke gas system with a closed rotating bolt.

Sig Sauer MPX-K Auctions

2 active auctions ending soon

Sig Sauer MPX K 9mm 4.5" MPXK SB TAC PDW BRACE

Sig Sauer MPX K 9mm 4.5" MPXK SB TAC PDW BRACE

Sig Sauer MPX K 9-mm MPXK Short-Stroke Piston

Sig Sauer MPX K 9mm 4.5" MPXK Short-Stroke Piston +4 MAGS & ORIG BOX

Sig Sauer MPX K 9mm 4.5" MPXK Short-Stroke Piston +4 MAGS & ORIG BOX

Sig Sauer MPX K 9-mm MPXK RADIAN RAPTOR

Recently Sold

Sig Sauer MPX Copperhead 9mm TIMNEY TRIGGER 4.5" THREADED +3 MAGS & OG BOX

Sold On 08/21/2026

Sig Sauer MPX Copperhead 9mm TIMNEY TRIGGER 4.5" THREADED +3 MAGS & OG BOX

Sig Sauer MPX Copperhead 9-mm Short-Stroke Piston

SBR Sig Sauer MPX K 9mm 4.5" Side-Folding PDW Piston-Driven M-LOK +4 MAGS

Sold On 08/07/2026

SBR Sig Sauer MPX K 9mm 4.5" Side-Folding PDW Piston-Driven M-LOK +4 MAGS

Sig Sauer MPX K 9-mm Suppressor-Ready Tactical

Sig Sauer MPX K 9mm 4.5" ISLER VENTED HANDGUARD Short-Stroke Piston +2 MAGS

Sold On 05/20/2026

Sig Sauer MPX K 9mm 4.5" ISLER VENTED HANDGUARD Short-Stroke Piston +2 MAGS

Sig Sauer MPX TELESCOPING BRACE

UPGRADES Sig Sauer MPX K 9mm 4.5" Black & Carbon Fiber + AIMPOINT ACRO C-2

Sold On 05/04/2026

UPGRADES Sig Sauer MPX K 9mm 4.5" Black & Carbon Fiber + AIMPOINT ACRO C-2

Sig Sauer MPX K TTI, LANCER, SIDE FOLDER + 2 MAGS

Sig Sauer MPX K Pistol 9mm 4.5" +ORIG BOX

Sold On 03/13/2026

Sig Sauer MPX K Pistol 9mm 4.5" +ORIG BOX

Sig Sauer MPX 9-mm PCC-PDW Tactical-Defense

Sig Sauer MPX K 9mm 4.5" Personal Defense Pistol +2 MAGS

Sold On 03/13/2026

Sig Sauer MPX K 9mm 4.5" Personal Defense Pistol +2 MAGS

Sig Sauer MPX K 9-mm MPXK Tactical PDW

Sig Sauer MPX K 9mm 4.5" PCC PDW Piston-Driven M-LOK +3 MAGS & ORIG BOX

Sold On 03/04/2026

Sig Sauer MPX K 9mm 4.5" PCC PDW Piston-Driven M-LOK +3 MAGS & ORIG BOX

Sig Sauer MPX PCC PDW 9-mm Tactical Defense

Sig Sauer MPX-K 9mm 4.5" MPXK +2 MAGS

Sold On 01/23/2026

Sig Sauer MPX-K 9mm 4.5" MPXK +2 MAGS

Sig Sauer MPX-K 9-mm PDW PCC MLOK M-LOK

PCC Sig Sauer MPX K 9mm 4.5" +4 MAGS PDW

Sold On 10/31/2025

PCC Sig Sauer MPX K 9mm 4.5" +4 MAGS PDW

Sig MPX K 9-mm Odin Weapon Light

Sig Sauer MPX K Gen 2 9mm 4.5" Timney Trigger +6 MAGS & ORIG BOX

Sold On 10/01/2025

Sig Sauer MPX K Gen 2 9mm 4.5" Timney Trigger +6 MAGS & ORIG BOX

Sig Sauer MPX 9-mm Folding PDW M-LOK

PDW! Sig Sauer MPX K 9mm 4.5" AR-9 AR9 MPXK

Sold On 09/24/2025

PDW! Sig Sauer MPX K 9mm 4.5" AR-9 AR9 MPXK

Sig Sauer MPX-K 9-mm Compact PCC

Sig Sauer MPX K 9mm AR-9 AR9 MPXK

Sold On 09/19/2025

Sig Sauer MPX K 9mm AR-9 AR9 MPXK

Sig Sauer MPX K 9-mm AR9 MPXK

Sig Sauer MPX K 9mm 4.5 AR-9 AR9 +ORIG BOX

Sold On 09/12/2025

Sig Sauer MPX K 9mm 4.5 AR-9 AR9 +ORIG BOX

Sig Sauer MPX K 9-mm AR-9 AR9

2019-2021 Sig Sauer MPX K 9mm 4.5" AR-9 AR9

Sold On 09/10/2025

2019-2021 Sig Sauer MPX K 9mm 4.5" AR-9 AR9

Sig Sauer MPX K 9mm AR-9 AR9

Sig Sauer MPX K 9mm MPXK

Sold On 08/08/2025

Sig Sauer MPX K 9mm MPXK

Sig Sauer MPX K 9-mm MPXK

Sig Sauer MPX K 9mm AR-9 AR9 4.5" Type III Hard-Coat Anodized +3 MAGS

Sold On 07/30/2025

Sig Sauer MPX K 9mm AR-9 AR9 4.5" Type III Hard-Coat Anodized +3 MAGS

Sig Sauer MPX 9-mm AR9

Sig Sauer MPX K 9mm 4.5" +3 MAGS

Sold On 07/25/2025

Sig Sauer MPX K 9mm 4.5" +3 MAGS

Sig Sauer MPX K 9-mm

Sig Sauer MPX-K 9mm 4.5" PDW

Sold On 07/04/2025

Sig Sauer MPX-K 9mm 4.5" PDW

Sig Sauer MPX-K 9 mm

Sell a Gun Consign a Gun

Sig Sauer MPX-K 9mm 4.5" +ORIG BOX

Sold On 06/30/2025

Sig Sauer MPX-K 9mm 4.5" +ORIG BOX

Sig Sauer MPX-K

Sig Sauer MPX-K 9mm AR-9 AR-Pistol AR9 4.5" Sig-Sauer MPX-K SIG-MPX-K

Sold On 04/14/2025

Sig Sauer MPX-K 9mm AR-9 AR-Pistol AR9 4.5" Sig-Sauer MPX-K SIG-MPX-K

Sig Sauer MPX-K IN LEAD WE TRUST 4.5″ Sig-MPX

Sig Sauer MPX K 9mm 4.5" Sig-Sauer MPX-K SIG-MPX-K +2 MAGS

Sold On 04/11/2025

Sig Sauer MPX K 9mm 4.5" Sig-Sauer MPX-K SIG-MPX-K +2 MAGS

Sig Sauer MPX K Sig-Sauer MPX SIG-MPX-K

Sig Sauer MPX-K 9mm AR-9 AR 8" Sig-Sauer-MPX-K +ORIG BOX

Sold On 03/21/2025

Sig Sauer MPX-K 9mm AR-9 AR 8" Sig-Sauer-MPX-K +ORIG BOX

Sig Sauer MPX-K Sig-Sauer-MPX-K

Sig Sauer MPX-K 9mm AR-9 AR 4.5" Sig-Sauer-MPX-K TIMNEY TRIGGER +3 MAGS

Sold On 02/24/2025

Sig Sauer MPX-K 9mm AR-9 AR 4.5" Sig-Sauer-MPX-K TIMNEY TRIGGER +3 MAGS

Sig Sauer MPX-K PDW Sig-Sauer-MPX-K

Sig Sauer MPX-K 9mm AR-9 AR Sig-Sauer-MPX-K TIMNEY TRIGGER +BOX & ROMEO5

Sold On 02/21/2025

Sig Sauer MPX-K 9mm AR-9 AR Sig-Sauer-MPX-K TIMNEY TRIGGER +BOX & ROMEO5

Sig Sauer MPX-K Sig-Sauer-MPX-K+3 MAGS

Sig Sauer MPX-K 9mm AR-9 AR 4.5" Sig-Sauer-MPX-K PDW Timney Trigger

Sold On 01/06/2025

Sig Sauer MPX-K 9mm AR-9 AR 4.5" Sig-Sauer-MPX-K PDW Timney Trigger

Sig Sauer MPX-K Sig-Sauer-MPX-K PDW AR

Sig Sauer MPX K 9mm AR-9 AR Sig-Sauer-MPX AR-9-AR9 AR Pistol +ORIG BOX

Sold On 01/03/2025

Sig Sauer MPX K 9mm AR-9 AR Sig-Sauer-MPX AR-9-AR9 AR Pistol +ORIG BOX

Sig Sauer MPX K 9x19 Sig Sauer-MPX-K Piston Driven

Sig Sauer MPX-K 9mm AR-9 AR 4.5" Sig-Sauer-MPX-K PDW Timney Trigger +2 MAGS

Sold On 01/03/2025

Sig Sauer MPX-K 9mm AR-9 AR 4.5" Sig-Sauer-MPX-K PDW Timney Trigger +2 MAGS

Sig Sauer MPX-K Sig-Sauer-MPX-K PDW AR

Sig Sauer MPX K 9mm 4.5" Black Anodized Sig-Sauer TIMNEY TRIGGER MPX +OPTIC

Sold On 09/16/2024

Sig Sauer MPX K 9mm 4.5" Black Anodized Sig-Sauer TIMNEY TRIGGER MPX +OPTIC

Sig Sauer MPX K Sig Sauer-MPX K

Sig Sauer MPX K 9mm 4.5" AR-9 AR Sig-Sauer MPX +ORIG BOX

Sold On 12/28/2023

Sig Sauer MPX K 9mm 4.5" AR-9 AR Sig-Sauer MPX +ORIG BOX

Sig Sauer MPX K Sig Sauer-MPX +2 MAGS

Sig Sauer MPX K FDE 9mm 8" FDE Anodized MPX +3 MAGS

Sold On 12/07/2023

Sig Sauer MPX K FDE 9mm 8" FDE Anodized MPX +3 MAGS

Sig Sauer MPX Sig Sauer-MPX 9mm

Sig Sauer MPX-K 9mm 4.5" Black Hard Coat An AR-9 AR MPX-K 2020

Sold On 11/26/2023

Sig Sauer MPX-K 9mm 4.5" Black Hard Coat An AR-9 AR MPX-K 2020

Sig Sauer MPX-K Sig Sauer-MPX-K

NEW Sig Sauer MPX K 9mm Sig-Sauer MPX 4.5" MPX-K AR Pistol 30+1 ORIG BOX

Sold On 07/05/2023

NEW Sig Sauer MPX K 9mm Sig-Sauer MPX 4.5" MPX-K AR Pistol 30+1 ORIG BOX

Sig Sauer MPX K

Sig Sauer MPX K 9mm AR Pistol AR 4.5" Black Sig-Sauer MPX-K AR-9-AR 2MAGS

Sold On Invalid Date

Sig Sauer MPX K 9mm AR Pistol AR 4.5" Black Sig-Sauer MPX-K AR-9-AR 2MAGS

Sig Sauer MPX K Sig Sauer-MPX AR9 K-Model 9x19