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mcx

The SIG MCX is a weapon series designed and manufactured by SIG Sauer, featuring a short-stroke gas piston system, carried over from the SIG MPX submachine gun. It is made in both semi-automatic and selective fire configurations. It is available in rifle, short-barreled rifle, and pistol configurations.
Built at SIG's New Hampshire factory, the MCX was "engineered from the ground up to be silenced, light and short" according to a SIG Sauer brochure.
In 2016, SIG recalled some weapons with the first generation bolt carrier group.

View More On Wikipedia.org
Recent contents
  1. Tacticalsaloon

    SIG SBtactical folding brace metal

      1. For Sale
    • $150
    • Albany
    • Oregon
    Selling for a friend Never used, like new, SIG SB folding brace metal. Dm for contact details to coordinate the sale.
  2. D

    P320

      1. For Sale
    • $500
    • Portland
    • Oregon
    P320 for sale. 500 local. ________________ ***Pm or reply for pics***
  3. J

    Sig Sauer MCX Gray Virtus Gen 2

      1. For Sale
    • $2000
    • Albany
    • Oregon
    I am selling my Sig MCX Virtus Gen 2 Gray in color. Super hard to find. Comes with hard case no original box. 50 or so rounds fired. Great rifle 16” 556 barrel. Folding stock asking $2,000.00 I will pay transfer fee if agreed apon with sale price.
  4. RainMan_PNW

    SIG MCX / MPX PCB Folding Brace Kit - Black

      1. For Sale
    • $140
    • La Center
    • Washington
    Black PCB "swivel brace" off of my MPX. Been to the range once, so it's got a few normal handling marks. This should fit anything with a 1913 rail interface at the back. PayPal gift (no comments in the payment) or add 4%, or cash F-6’-F PM me if you are interested or want more info.
  5. Erniemcrackin

    Sig Sauer MCX gen 1, 5.56 & .300blk

      1. For Sale
      2. For Trade
    • $1600
    • Portland
    • Oregon
    Sig Sauer MCX gen 1, 5.56 & .300blk barrels, side folding and collapsible stocks. Sig Romeo red dot included for $1600/obo. Low round count on both barrels. pgraded BCG & Trigger. open to trades plus or minus cash: 3.5x trijicon ACOG w/green horseshoe dot. 6.5 creedmore bolt rifle that accepts...
  6. RainMan_PNW

    SIG PCB Folding Brace Kit - FDE

      1. For Sale
    • $135
    • La Center
    • Washington
    I've got a folding PCB "swivel brace" off of a Sig MCX Virtus. It's lightly used and has a few marks, though I've seen the same sort of marks on the flexible brace part of every new FDE brace that I've looked at too. :s0092: This will fit/work on any pistol that's got a 1913 rail on the back -...
  7. RainMan_PNW

    Sig MCX Virtus 300 BLK 16" Barrel "conversion kit"

      1. For Sale
      2. For Trade
    • $420
    • La Center
    • Washington
    I've revised what parts I'm looking to get rid of from my Sig MCX Virtus. $420 - Unfired 300 BLK 16" Virtus barrel (tapered lug) with the taper adapter, flash hider, and bolt. Everything you would get with a Sig MCX Conversion kit that runs ~$580 new. You can use this in either a Virtus or a...
  8. S

    SIG MCX STOCK ADAPTER $50

      1. For Sale
    • $50
    • Portland
    • Oregon
    MCX Stock Adapter Kit gives you the ability to upgrade your rifle and install MCX folding stock assemblies Never used $74.99 new MCX Stock Adapter $50 cash or paypal
  9. RainMan_PNW

    Sig Sauer MCX Virtus 300 BLK 16 inch AR15 Conversion Kit

      1. For Sale
      2. For Trade
    • $1100
    • La Center
    • Washington
    Up for sale is a conversion kit for running a Sig Sauer MCX Virtus upper on your standard AR15 lower. This is one of the most versatile piston-driven setups I’ve ever used - I have a second one with a 6.75” barrel on my registered SBR lower. Barrel swaps take a matter of minutes using a T27...
  10. Screach

    Sig Sauer MCX Virtus Pistol LNIB (Price Drop)

      1. For Sale
    • $1600
    • Beaverton
    • Oregon
    Hey guys, up for sale today is a LNIB Sig Sauer MCX Virtus FDE chambered in 5.56. This pistol was just purchased and has 50 rounds through it to check for function and zero the optic. The pistol has the PCB brace attached from sig. It will come with original box, mag, lock, and paperwork from...
  11. J

    Sig MPX 8 Inch Gen 2

      1. For Sale
      2. For Trade
    • $2000
    • Corvallis
    • Oregon
    Sig MPX 8 inch Gen 2 includes 8 Qty 30 round mag ($430 value) 2 Qty 20 round mag ($60 value) 1 Qty Lancer MPX mag Cinch ($25 value) 1 Qty Lancer Carbon Fiber 8” hand guard ($245 value) 1 Qty Next Level advanced kit with Block and ambi charging handle ($95 value) 1 Qty PSB collapsible Brace...
  12. RainMan_PNW

    WTS WA  Sig MPX / MCX Pistol Braces

    I've got two different pistol braces here that need a new home... Sig Telescoping Pistol Brace (BRACE-X-COLLAPSIBLE-BLK) - $120 SOLD Came off my Sig MPX TacOps pistol before I switched that over to a side-folding brace Fits MPX and both Legacy and Virtus MCX, but will not fit a standard AR...
  13. RainMan_PNW

    WTS WA  Sig MCX Legacy stripped upper

    Breaking things up since most of the other MCX-specific stuff has sold... Sig MCX "stripped" upper receiver (Legacy) - $250 SOLD Has 400 rounds total through the upper Includes the newer ambidextrous "gas buster" style charging handle Does NOT include a bolt carrier or bolt (hence being called...
  14. RainMan_PNW

    WTS WA  Sig MCX Parts - Virtus and Legacy

    I've got some Sig MCX parts up for sale...all perfect parts for someone out there with an SBR'd or pistol Legacy MCX who wants to have more flexibility! Sig Telescoping Pistol Brace (BRACE-X-COLLAPSIBLE-BLK) - $140 Came off my Sig MPX TacOps pistol before I switched that over to a side-folding...
  15. RainMan_PNW

    WTS WA  Misc Parts - Sig, Aero, Strike Industries

    Moving to a new thread for consolidation. Cleaning up a little... I don't plan on using these, so I'm hoping someone else might. Not necessarily listed in any order... Aero Precision M4E1 Enhanced upper receiver - $100 GONE Assembled with dust cover and forward assist Made for use with BAR...
  16. RainMan_PNW

    WTB WA  Sig MCX pistol lower

    I realize this is a long shot, but I'm looking for a Sig MCX pistol lower. Needs to be a pistol, because I've already got an SBR AR lower with the adapter in it and need a pistol receiver for when I'm going places that I haven't gotten paperwork filed for... I don't need a brace... Have the...
  17. Seared Saba

    WTS OR  SIG MCX PISTOL / 11" 556 & 9" 300 BLK / 2 Stage Match Duo Trigger / Eotech EXPS3-4

    Up for grab is a SIG MCX pistol package: 11" 556 barrel, 9" 300 BLK barrel, PDW handguard for the 300 BLK barrel, 2 stage match duo trigger, and the Eotech EXPS3-4. The gun has shot 400 rounds only - 360 rounds for the 556 barrel and 40 rounds for 300 BLK. The gun is in excellent condition as...
  18. J

    Complete SIG Sauer MCX AR15 Conversion Kit 9 inch .300 blackout w/2-stage trigger & folding adapter

      1. For Sale
    • $1300
    • Bellevue
    • Washington
    For Sale Sig Conversion Kit with everything you need to convert your AR lower to accept a MCX Upper -Complete 9 Inch .300 Blackout Upper with BCG (Gen 1 Professionaly cut to 9 inches and timed from Parker Mountain Machine) Less than 400 rounds -Sig Flip Up Sights -Buffer Tube Eliminator / 1913...
  19. RainMan_PNW

    WTS WA  Misc Parts - Sig, Aero, Ballistic Advantage, BCM

    Moving to a new thread with a better title. Cleaning up a little... I don't plan on using these, so I'm hoping someone else might. Not necessarily listed in any order... Precision Reflex PRI 05-070-07 Forearm Sling Swivel Rail - $20 SOLD Mounts to the Gen III CF handguards, has a QD sling cup...
  20. C

    Sig mcx with Romeo red dot

      1. For Sale
      2. For Trade
    • $1400
    • Vancouver
    • Washington
    Mcx Rifle is awesome with sig red dot and giessle trigger selling for $1700 with everything If you see it before buying we can arrange or photos just ask Also on another ad sig 556 classic swat
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