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Sig Sauer

Sig Sauer MCX 300Blk Pistol - 9

Sig Sauer MCX 300Blk Pistol - 9
Only 4 left

Availability: In stock




Unlike every other firearm on the market, the SIG MCX was built for optimum performance with the 300BLK cartridge and a suppressor. The outcome is a firearm with superior suppression capability and enhanced reliability with both supersonic and subsonic loads A two-position gas block makes the transition from subsonic to supersonic as fast as flipping the lever. Changing between 300BLK and 5.56 NATO is as simple as swapping barrels and magazines in a matter of minutes. Converting to 7.62x39mm simply requires barrel, magazine, as well as an additional bolt change. Each SIG MCX features an aluminum KeyMod handguard, AR-style lower controls and utilizes standard STANAG magazines. A revolutionary recoil system does not require a buffer tube, allowing the side-folding Pistol Stabilizing Brace. A picatinny top rail allows for the mounting of lights or optics. The aluminum forend allows for rail sections to be added where they are needed, permitting the attachment of accessories. The lower receiver offers familiar AR-style controls. Completely ambidextrous controls include the safety, magazine release and charging handle.

- 9" Hammer Forged Barrel
- Ambidextrous Selector, Mag Release and Charging Handle
- Skeletonized Low-Profile Side Folding Stock
- Short-Stroke Gas Piston with Auto-Regulating Gas Valve
- Alloy KeyMod Handguard
- SBX Stabilizing System


- Item Number:PMCX-300B-9B-AL-PSB
- Action:Semi-Auto
- Operating System:Short-Stroke Gas Piston with Auto-Regulating Gas Valve
- Caliber:300BLK converts to 5.56 NATO and 7.62x39
- Overall Length: 29.6"
- Trigger Type: Mil-Spec
- Trigger Weight: 6.6-8.6 lb
- Barrel Length: 9" Hammer Forged
- Rifling: 1:6
- Number of Grooves    
- Weight w/o Mag: 5.75 lb
- Magazine Capacity:30 rounds
- Magazine Type:AR
- Accessory Rail:Alloy KeyMod Handguard
- Features:Suppressor Ready and KeyMod Handguard


FFL Required Before Shipping.

Please have your dealer email their license to or they can also fax it in. Please give us a few days to process the information

Additional Info

Additional Info

Manufacturer Sig Sauer
Finish No
Barrel Length No
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No



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