SIG MCX shipping in 5.56

The much acclaimed and anticipated Sig Sauer MCX rifle has been shipping in 5.56x45mm for the past couple of weeks for the civilian market. MSRP is $1,999 for the standard 16 inch barrel variant. In addition, SIG just opened up an MCX giveaway for a 16 inch barrel on their website for anyone that wants to run their luck for one. In addition the company just released the first episode of a video series about the MCX, in the spirit of promotion. It’s actually a professionally well done video, so be sure to give it a look. Lots of gratuitous MCX shooting, and a look inside their factory, talking with some of the design staff about the rifle. However, the .300 Black Out (MSRP $2,284) and 7.62x39mm (MSRP not released yet) rifle versions have not been made available to the general public as of yet. Also note that this release has to do entirely with the rifle MCX, and not the SBR or pistol versions of it, which is an entirely separate matter.

Phil shooting the SIG MCX carbine at SHOT 2015. This is a great carbine and very accurate. SIG 1x6 optic.

Phil shooting the SIG MCX carbine at SHOT 2015. This is a great carbine and very accurate. SIG 1×6 optic.

src=”” alt=”gg” width=”1027″ height=”561″ /> A look at some of the stock designs from the video, showing the diversity of options available for the MCX stock. The standard one appears to be on the lower right, and there hasn’t been a mention of how a customer will get to choose all these stock options.[/caption]

They must have been waiting for a while to release this episode, because I see snow on the ground at the end of it.


From the SIG MCX website, just looking at some the options of components is pretty neat. 


Infantry Marine, based in the Midwest. Specifically interested in small arms history, development, and usage within the MENA region and Central Asia. To that end, I run Silah Report, a website dedicated to analyzing small arms history and news out of MENA and Central Asia.

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  • Joshua

    Until the offer a URG and stock don’t care. I have a SBR lower that needs this.

  • iksnilol

    Why is the 300 BLK version 300 dollars more expensive? I thought it was just a barrel change?

    • TheNotoriousIUD

      They have to add more tactical.

    • kregano

      I don’t know, but based on the one video review of the MCX I’ve seen, you need to do some part swapping on the BCG for the conversion too, but it still shouldn’t cost $300 more.

    • aka_mythos

      They probably produced at a lower volume… So take overhead and setup costs divided by a fewer number of rifles and you have variants that cost more. The only alternative would be if the 5.56 cost more to absorb the added overhead.

      • dshield55

        You’d think it goes through all the same inspections and processes, it’s just that one assembly station that installs barrels does a .300 barrel instead of 5.56 during the .300 assemblies.

        • aka_mythos

          For example, consider that it’s different barrel blanks, lathed down to different profiles than the 5.56 barrels. Theyre maybe using different machines because they’re a lower volume, those machines might be slower or less efficient but even if their the same machines you’re talking about so many hours of someone’s times to program and setup the machine for lower volumes. When that’s done for the 5.56 barrels they might produce 10,000 barrels but for 300blk maybe only a 1000 at a time. Even still if they were to produce the same volume run, but fewer runs. and simply warehouse them than you have warehousing overhead that they have to absorb the costs of while they wait to build enough rifles to use them up. Different businesses have different accounting practices that dictate how they absorb the cost.

          • DonDrapersAcidTrip

            the only thing I don’t understand is why you had to explain this anyone

    • Tom

      I would guess that’s what the money guys think they can sell it for.

    • USMC03Vet

      Because they know if shooters are buying that caliber they have the money to afford it.

    • MrEllis

      Odd, wasn’t the entire platform designed around the 300 BLK? Funny how it’s the most expensive… maybe because it’s higher… or it’s a… You know what, maybe it’s just because 300 BLK is close to 300 BKS?

  • Plumbiphilious

    Will we get reviews from TFB of the mass-production/shipping model?

  • Patrick M.

    I heard a rumor about the MCX winning some JSOC contract. Anyone heard anything similar?

    • mig1nc

      Yeah, that was in reference to the LVAW. And also if you look online you can find pics of UK anti-terror units using it when Netanyahu visited London.

      • Yes, I believe the MCX was designed for the Low Visibility Assault Weapon contract, which they won.

  • Cal.Bar

    Still waiting for the promised adapter kit to utilize with my existing M4 lower. Come on Sig!

  • EZ

    The MCX has been available for months at Cabela’s already. It’s $2,199.99 with the .300 Blackout and 5.56 barrel.

  • Sianmink

    Wait will a MCX upper mate with a standard AR15 lower?

    Having one more option for buffertube-free builds is a big plus.

    • kregano

      Yes, but you need a special adapter.

  • Tom

    Anyone else find it funny that they “designed this from the ground up” yet insisted on compatibility with existing lowers?

    • dshield55

      Sounds like existing lowers was their ground then? And they just built up from there?

    • It was a requirement for the LVAW, IIRC.

      • Tom

        That would make sense.

    • TheSmellofNapalm

      Go. Go build something interesting and successful. Go do it.

  • dshield55

    This is really weird because I was certain these had already been available and shipping. I ran into a guy at a gun range in Texas who had an MCX back in April. There’s no mistaking it because I made a big deal about it being an MCX and even asked him if it was because I didn’t realize they were already available. When he was done shooting it, he even inquired if I was looking to buy one.

    • mig1nc

      Cabelas had an exclusive on early production model sales back then. These newer versions have been significantly revised including a new adjustable gas block instead of the original self-regulating gas block. Think of these as the first shipment of the regular production model. I saw one at Bass Pro a couple of weeks ago, so they are definitely out there now.

      • dshield55


      • Robert Powell

        I picked myself up one of the cabela’s rifles a while back. It’s a fantastic rifle. The only other difference between the current production and the model I got is that my bcg is nickel boron and the new one is not. Also I paid about $1700 if memory serves and it came with a 300 and 556 barrel. I saw a new model recently at palmetto state armory and they want 1700 for theirs and it came in only 556.

        • Colin s

          The old BCG was nickel boron but the new one isn’t? what is it then, do you know?

          • Robert Powell

            I believe it is just a standard manganese phosphate.

  • Gabriel Owens

    wish someone would start making a non AK rifle in 5.45. Theirs a great opportunity there.

    • HB

      Actually there had been(almost) ; S&W announced 5.45 M&P15 a few years ago. I saw it on display at SHOT show, probably around 2006~2008. But I don’t know whether they’ve actually released it or not(they’re not selling it now, but don’t know about past).

    • Weaver

      You can build a 5.45 ar15.

  • I’m wearing headphones. Ow, my ears.

    • Yep

      Lol. Yeah crap audio but watching it makes me pause about it’s modularity. The Larue PredatOBR take down seems much more simpler imo. Just not convinced I want all those little screws.

  • dshield55

    Yeah, I met a guy at a range back in April that had one and he told me they were shipping then and asked if I was interested in buying his.

  • Lance

    Save money and time get a AR-15 over this over priced AR-18 knock off.

    • andrey kireev

      What if I don’t want a THIRD AR15 ?

    • DW

      What if I told you this is not an AR18 knock off. Not even close to the truth, just like your comments.

  • Green Hell

    Absolutely HATE that handguard, reminds me of ARX-100, which is impossible to hold comfortably by big hand, unless you cut off your thumb. Why change the stuff just for the sake of change? If you want to make a piston AR-15 with a folding stock, just make a piston AR-15 with a folding stock, there’s no need for so many unnecessary proprietary stuff.

  • Green Hell

    It would probably be popular in Russia if we had better import and gun ownership laws.

  • jerry young

    looks like just another version of an AR, the only big difference I see if they did away with the buffer tube, you gotta wonder what the recoil on this is like? I see they also went back to the old beer can opener for a flash suppressor

  • Lolattfb

    What the heck is a 1×6 optic? Is it a scope with a 6mm lens?? Or do you mean 1-6x, a completely different thing that a gun website should know the terminology for?

  • Aaron

    TFB review this rifle please

  • Patrick Karmel Shamsuddoha

    the hype game is strong… side not i have wanted on of these for a while