Safety Reminder: Always follow proper firearm safety protocols and local laws.

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 2

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 3

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 4

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 5

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 6

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 7

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 8

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 9

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 10

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 11

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 12

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 13

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 14

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 15

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 16

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver) - View 17

MCX

Used SIG MCX 5.56 – FDE, Folding Stock, M-LOK Handguard (Multi-Caliber Receiver)

SIG MCX 5.56 in FDE with folding stock, free-float M-LOK handguard, 3-prong flash hider, ambi controls, and PMAG. Multi-caliber-marked receiver. Clean, ready for your optic.

SKU:	798681660872
Model:	MCX

Description

Only one available.

Built around SIG’s short-stroke piston system, this MCX is a premium, soft-shooting carbine configured in 5.56 NATO and finished in FDE. The multi-caliber receiver marking opens the door for caliber-change uppers and barrel kits, while the slim M-LOK handguard keeps weight forward of the balance point to a minimum. A 3-prong flash hider, full-length pic rail, and ambidextrous controls round out a feature set designed for fast handling and reliability.

This example shows the low-profile, right-side folding stock that locks up solid and keeps overall length compact for storage and transport. It also includes a vertical grip mounted to the M-LOK handguard (appears to be Daniel Defense branded) and a 30-rd PMAG. Overall finish presents as honest light handling with no abuse visible in the photos—exact round count unknown. If you’ve wanted a piston-driven MCX in a proven 5.56 setup, this one is turnkey and ready for your optic and sling.

Specs

Specification	Detail
Manufacturer	SIG SAUER
Model / Family	MCX (multi-caliber marked receiver)
Caliber	5.56 NATO (per hang tag)
Operating System	Short-stroke gas piston
Barrel	Carbine-length (exact length not confirmed from photos)
Muzzle Device	3-prong flash hider (type not confirmed)
Handguard	Free-float M-LOK, full-length top rail
Stock	Right-side folding, low-profile skeleton style
Controls	Ambidextrous safety; ambi charging handle cut; bolt catch/release standard MCX pattern
Finish / Color	FDE receivers, matching furniture
Furniture	Textured FDE pistol grip; vertical grip on handguard
Magazine	Includes 30-rd PMAG (shown)
Condition (observed)	Very good; light handling wear
Included	Rifle as shown (no optic/sights included in photos)
Serial (visible)	63J028822 (shown on tag)
Category	Modern carbine / tactical gear