CMMG Launches AR Pistol Line

CMMG has now released the line of pistols, which are available now on their website.  Made from their popular line of rifles, the pistols will have the same high quality that CMMG is known for.  I foresee their line of pistols being popular, especially after the recent ATF letter about the Sig brace. Set to be available in 9mm and .300BLK, both are a great choice for a PDW.  Press release after the break.



Fayette, MO — In response to customer feedback, CMMG has developed a line of new AR pistols that utilize properties from its sought after line of short-barreled rifles, including the popular RKM7 free float KeyMod hand guards. The resulting product launch includes two models of AR pistols chambered in 9mm and .300 AAC Blackout.

CMMG Mk4 PDW 300 BLK Pistol“We received a lot of feedback from our customers asking us to come out with a line of AR-style pistols,” said Jeff Overstreet, co-owner of CMMG Inc.  “As you can see, we’ve listened. Like all the guns in the CMMG line, we’ve tried to keep the weight down and the quality of manufacturing to its highest standard so that you’ve got a gun that functions properly and is fun to shoot every time you take it to the range.”

The new Mk9 PDW Pistol is chambered in 9mm and comes with one 32-round magazine.  The new Mk4 PDW Pistol is chambered in .300 AAC Blackout and comes with one 30-round Magpul PMAG. Each model comes with a Magpul MOE pistol grip, an A2 muzzle compensator and features an ambidextrous rear sling mount.

Both pistols have a slim, ergonomic profile, thanks to CMMG’s RKM7 free-floating KeyMod hand guard.  The KeyMod slots are located at the 3, 6 and 9 o’clock positions and allow users to mount compatible accessories directly to the hand guard.  For accessories that are not yet compatible with the KeyMod system, CMMG offers separate 5-slot rails that attached to the hand guard.  For mounting sights or optics, a 1913 Picatinny rail runs across the top of the firearm.

CMMG AR Pistol Specifications:
Calibers:  9mm  / .300 AAC Blackout
Barrel:  8.2″ medium weight, 1:7” twist
Muzzle:  A2 Compensator
Hand Guard:  CMMG RKM7 Free-Float KeyMod hand guard
Receiver:  Forged 7075-T6 AL
Trigger:  Single Stage Mil-Spec Type
Furniture:  Magpul MOE Pistol Grip
Weight: 5.3 lbs (9mm unloaded), 4.6 lbs (300 BLK unloaded)
Length: 24 inches
Magazine:  32rd (9mm), 30rd PMAG (300 BLK)
MSRP’s:  $1,099.95 for Mk9 PDW Pistol (9mm), $1,049.95 for Mk4 PDW Pistol (300 BLK)

CMMG Lifetime Quality Guarantee
CMMG, Inc. will guarantee its products against defects in material or workmanship.  CMMG, Inc. will repair, replace or substitute part(s) (at CMMG, Inc. discretion) at no charge to the customer if a defect of material or workmanship is found. All service work must be carried out by CMMG, Inc.

About CMMG:
CMMG began in central Missouri in 2002 and quickly developed into a full-time business because of its group of knowledgeable and passionate weapons enthusiasts committed to quality and service. Its reputation was built on attention to detail, cutting edge innovation and the superior craftsmanship that comes from sourcing all their own parts. By offering high quality AR rifles, parts and accessories, CMMG’s commitment to top-quality products and professional service is as deep today as it was when we began.
For more information, please visit:

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CMMG Mk4 PDW in .300BLK


  • jack don

    Why not design a bigger buffer tube?

    • BOB

      It exists, its called an A2 rifle receiver extension.

      • echelon

        Yes, and then magically according to the ATF, you’ll then not have a pistol, but an SBR, which we all know is like 8x more evil than the standard pistol…

        • BOB

          I’m afraid you are wrong about that, the only situation in which that could be correct is if you had an unmated A2 stock in your possession as well. Read up on it. The ar pistol section has a ton of ATF tech group letters and this is covered.

          • echelon

            I know and understand this. My point is that the ATF makes really bad and sometimes seemingly arbitrary ruling on these things and for dubious reasons. For instance, what does “in your possession” mean? Does it mean on you at the range? In your vehicle? In your basement? You may think that’s a superfluous thing, but to the ATF it is not.

            An 80% AR lower is “legal”, until it’s not. Ares Armor case in point. And Sig’s muzzle brake that is classified as a suppressor part even though it makes the firearm report louder.

            So, yes, technically just by adding the A2 buffer you won’t have an SBR, but you’ll be on that very slippery slope, which is just where the ATF wants you.

          • BOB

            personally, I just don’t have an A2 stock and won’t unless I have a rifle to put it on. simple enough.

          • echelon

            Yep, and the ATF’s silly rule did it’s job: control your actions.

          • BOB

            cant argue that.

          • echelon

            Sadly, most people don’t! And we have gotten what we deserve because of it unfortunately…

          • Cymond

            “For instance, what does “in your possession” mean?”

            I recently saw a letter where someone asked ATF a similar question. ATF’s response letter is that if you have dominion & control, then it is considered possessed.

            “My point is that the ATF makes really bad and sometimes seemingly arbitrary ruling on these things and for dubious reasons.”

            Yes they do, but for now at least a simple A2 extension has been ruled to be legal on a pistol, so please don’t say “Yes, and then magically according to the ATF, you’ll then not have a pistol, but an SBR” when an A2 is mentioned.

          • echelon

            I think you’re missing the bigger point about it being completely arbitrary. How does having a pistol buffer vs A2 buffer vs SB15 brace vs collapsible stock alter the function or usability of the weapon in the slightest to warrant a classification from “pistol” to “SBR”?

            And furthermore just by having “dominion and control” of another part which may be needed for another rifle and in which case is normally not illegal to possess now makes you a possible felon?

            Or how about attaching a vertical foregrip which also is a no-no on a pistol as it now magically creates an SBR, but wait! an angled foregrip is A-OK!

          • You can buy a rifle at 18 years old, but you have to be 21 to buy a handgun. Why? Because handguns are more deadly? In most cases, no, handguns aren’t more deadly. It must be because pistols are more concealable.

            So why is an SBR, larger than a pistol, but smaller than a “normal rifle” require fingerprinting, a chief law enforcement officer sign-off, a $200 tax, registration, and a 10 to 12 month wait to get the approval to take possession or build it?

            In most states, you can go into a gun shop, or maybe a sporting goods store, and walk out the same day with either a tiny pistol, or a long rifle, but something in between the two is taboo and rather heavily restricted? It doesn’t even matter if it’s a single-shot or semi-automatic.

            It doesn’t make much sense, does it?

          • echelon

            Bingo. And we should be asking the larger philosophical questions like these and educating people so as to repeal and reject stupid “laws” such as these…

            And stop giving ATF carte blanche to define everything as they see fit…

          • Cymond

            Yes, it’s arbitrary, but you seem to have missed my point. Please don’t tell people that things are illegal when they’re not.

          • echelon

            I added an edit after Bob’s response…but my point is still clear: You can “technically” have an A2 buffer and be ok, but if you have the A2 stock under “dominion and control” then you are still technically in hot water…so why chance it? Use a pistol buffer or get an SB15 brace and be done with it…

            I tell everyone not to put a railed forend on their “pistols” as well for the same reasoning. I’ve seen many people shooting at ranges that had an “AK pistol” or “AR pistol” and it came from the gun dealer or factory with a railed forend and they put a vert grip on it not knowing that now they were in SBR land.

            Arbitrary laws should not be on the books that make otherwise law abiding citizens potential felons on a whim…

          • Anon. E Maus

            80% lowers weren’t ever illegal you dummy, the ATF had a fit over Ares because they didn’t find their lowers to be 80% lowers, but finished receivers, at which point they’re legally firearms.

            There’s a hole that once drilled into an 80% lower, makes it a firearm, what Ares did was drill that hole and fill it in with a different colored plastic (to make it easier to make into a finished gun at home), which the ATF said doesn’t matter, once that hole is drilled, it’s a firearm.

            I don’t agree with their rulings, but they’re being consistent here.

          • echelon

            Actually, you are completely wrong. And please refrain from the name calling, please. The lowers in question at Ares were never “drilled” nor was there ever a “hole” – a fire control pocket. The pocket portion is never hollow if you will- it’s created solid,what they apparently call a “biscuit” is formed first of the same, but different colored material and then the rest of the lower is formed around the biscuit. At no time is there ever a “firearm” formed.

            So maybe “arbitrary” isn’t the right word. How about capricious. In essence all the ATF did was move the goal posts because inventive manufacturers were trying to remove some of the roadblocks intentionally set up to prevent ordinary law abiding citizens from making home made ARs with no serial numbers. That’s what’s really at stake and issue here.

            This article contains the actual ATF letter language. I suggest you read it before calling people dummies!


  • Abatt

    I was thinking of a .300 blk pistol build, and it’s all done nice pre-made here and at a good price point to boot!

    Wonder why the 9mm is a little more expensive though.

    • Cymond

      The 9mm uses a specialized bolt and lower, so that probably adds to the cost. CMMG makes a dedicated 9mm lower that doesn’t need a mag well adapter but it costs significantly more than their standard lowers.

  • Christopher

    Why can’t anyone turn a rifle into a PDW and not make it butt ugly?

  • Cymond

    I was surprised to see this but I really shouldn’t be. I noticed a few weeks ago that they’re selling pistol uppers and barrels.
    I just wish they hadn’t discontinued their lightweight profile 22lr barrels.

  • ToM

    To the best of my knowledge putting a vfg on an AR pistol does not make it an sbr. It does make it an aow, which requires a $5 tax stamp and all the nfa red tape one can stomache.

  • Sam Pensive

    if i was shooting with this i’d wear a forearm padded brace and let the
    rear chamber metal tube rest against my body there.
    …that wouldn’t change the design of the pistol but i imagine it would make it much more shootable and more accurate.