CMMG 9mm Home Defense AR pistol Build

[@steveshafer974]

Great job explaining gentlemen. We also went with a CMMG barrel and bolt. I ordered a complete upper. All you need is their bolt and barrel. I went with the Aero EPC lower and had to remove the ejector as it was not allowing up to close the upper. I don't believe you will have this issue if you go with M4E1. However it is a pain to put the Glock mags in and I most likely will replace the Aero lower (EPC) with the M4E1. I did go with Kynshot hydraulic buffer and Vltor extended buffer tube and Tubbs springs. The gun shoots so smooth. It's like shooting a 22. I have a couple hundred rounds trough it and it has yet to fail to fire.

[@ThinLineDefenseCo]

Steve, glad to hear you got everything worked out. - Not Jason

[@davidwithers7181]

So you do have to run a buffer? I thought I read someplace it has to be heavier?

[@theredcelt627]

You have to use a CMMG radial delayed blowback barrel with their bolt. The barrel has the complementary cuts to the locking lugs on the bolt. That’s what allows for radial delay. I’m in complete agreement with you in regards to 9 mm PCC for home defense. I’m not wild about using a 5.56 mag that’s been retrofitted for 9mm, not unless it has an unmistakable visual and tactile differentiation from standard mags. However, I’d still rather have a dedicated 9mm mag, as I could fit more of them on a belt/chest rig/carrier.

[@maxcole3930]

I built the exact same pistol with aero handguard, upper, lower but with the cmmg deticated 22lr barrel & bolt. I love that little pistol! I was gonna do same thing with cmmg 9 but instead I just bought the cmmg Dissent MKG9 2 weeks ago. Having the folding brace with 6.5" barrel makes it super small & compact. My buddy has the 5.5" 9mm banshee. The Dissent has even less felt recoil because it has less than half the bolt weight plus a completely different buffer system. I've got 800 rounds through mine so far. Steel cases Tula, multiple brands of brass plus 124gn- 147gn federal hst & Speer gold dot HP's. It's been 100% reliable so far. Eats everything I've put in it. Definitely recommend the Dissent MKG9!!!!! Awesome pistol bro

[@BumBee22]

Built mine with the CMMG 9mm, 8" barrel complete upper, paired it with a Stag Arms mil-spec complete lower. Used an Endomag 9mm Pmag insert. Ran it today, without a hiccup. I'm thrilled to have found my favorite PDW for home defense as well. Thank you for sharing your video. You made my build as easy as it can be. With the mil-spec lower, I can use a Glock magazine insert or Colt magazine insert. I happened to like the use of Endomag. Its a lot less complicated and less expense.

[@mikeheadless]

I've heard that a kynshot buffer or A5 buffer reduces recoil even more. The CMMG bolt and barrel is the GOAT.

[@Ironsight_Army]

Love the A5 system

[@richardharris5819]

Great build, love all the hard work you've put into it.

[@spencemad_4x427]

Do you have to use a buffer and buffer spring?

[@michaelcostanza3483]

Outstanding Joe, Is the buffer spring a carbine and buffer is a 3.0. Thank you for a very detailed video. wizard, wizard, jimithy.

[@alanphillips1344]

Looking to build one too. Deciding between 9mm and 5.7x28, and 5” vs 8”. My main concern, accuracy. I have Aero upper and lower with Laws Tactical folder so it will be compact. I don’t need something to spray all over the place.

[@buddhamonk26]

Hoping you’ll answer. I have a spare m4E1 upper and lower set. I want to build the same pistol as you. All I need from Cmmg is the barrel, the bolt and the endo mag kit? No mods to the ejection port necessary?

[@ThinLineDefenseCo]

Correct - Jason

[@richardgrootveld1754]

What did you use to clamp the upper while you installed the barrel nut? I’ve been looking into building a pcc with the Cmmg kit but I’m guessing a normal reaction rod won’t work?

[@puthycat]

Awesome build, love the finish you have on it. did you do any modifications to the upper/lower or is it straight from the box, slap the BCG in and call it good

[@223dmr7]

Good afternoon Joe

[@tacticalcowboy4326]

If I buy one of their lowers with the pistol tube can I use a brace on it?

[@freddiesupnet1632]

This is how I want my next build, suppressed

[@KiLLJOY1056]

I just really feel like a Laser is such a useful part of home defense firearms. Sometimes you just wont have the time, Space, or mobility to look into your sights. I can literally be holding from the hip walking through tight doorways hiding in closets, and fire from any position and hit the target.

[@martinbrinegar1017]

A laser you could toggle would be ideal. Same with a flashlight. You don’t want somebody seeing where you’re coming from or know where you’re looking at all times.

[@CubeTycoon]

Hahaha...love the ending! Great video

[@Ironsight_Army]

Hide the dogs!!!

[@buddycherrix4837]

Any video of you firing it? How is the gas and recoil?

[@Hamrik_Oswald]

So the 9mm barrel threads into the ar15/556 upper without issue? There is so much I don't know about, but I am trying to learn. Your video is the most clear, I think out of all others I have tried watching. But that is the one question i have a hard time finding an answer to. Thank you.

[@BobbyTFishing]

so there is no need for an AR 9 ejector? does the CMMG bolt handle that? and im guessing since its all ar-15 its also last round bolt open with that build?

[@jackjohnson6188]

Do you have a recommendation for a 9mm thing I believe it’s called a lower and catch instead of the style m4e1? I love the ar style and last bolt hood open. Forgive me I’m new to this and never built one I’ve only had pistols lol.

[@rc4life128]

Awesome video! Love the cerakote (how did you do it??)!! Thanks for sharing!

[@rc4life128]

Gotta have that color in one of my builds. What color? Is it anodizing or cerakote? Thanks!

[@ThinLineDefenseCo]

it's cerakote candy. I'm pretty sure Joe did a video on that paint

[@rc4life128]

@@ThinLineDefenseCo Awesome, thank you!

[@Adventure-Couple406]

Love my banshee and train with it as my HD gun. What light mount is that?

[@Call_me_The_Breeze]

Has this information changed or been improved upon? 2 years alot of things do change Its excellent video and am wanting to build a 9mm pistol

[@jayheredia6975]

I’m confused. That bolt doesn’t look like my 9mm for my ar9. How does that shoot good but not mines?

[@DannyBashy]

Plz lmk if the cmmg bcg will fit in the aero epc 9 lower and upper

[@zacharyfett2491]

That muzzle device is going to blind an intruder! 😂 Insert Major Payne quote here………….

[@cfine31]

which muzzle threads used here?

[@j8opoco]

hi, thanks for this video, very informative. question: is the upper receiver and the hand rail standard 5.56 ones? or do i have to buy 9mm specific upper and hand rail? sorry if my question is a little stupid.

[@ThinLineDefenseCo]

not a stupid question! It's all standard but an upper or handguard isn't caliber specific. The barrel is. so the barrel and bcg are specific. You could use the same upper and handguard for like.... 6.5 grendel. You'd just need the grendel barrel and bcg

[@hutchklutch2594]

Which buffer and buffer weight do you use? I just bought the same setup. I got the entire Banshee upper though

[@ThinLineDefenseCo]

This one gets brough up a lot. Standard carbine spring and buffer weights

[@hutchklutch2594]

@ So… 3 Oz? I think mine is currently 3.75 Oz. Will that work ok or should I just use 3 Oz?

[@buddhamonk26]

I ordered everything to turn my m4e1 into the same set up. What spring and buffer weight do you recommend? I have standard spring with 3 oz buffer available. I also ordered a 308 spring with 7oz 4” buffer

[@ThinLineDefenseCo]

everyone on the team just runs standard. If you add a silencer you mayyyyy have to play with it. -Walsh

[@Hamrik_Oswald]

So if you swapped with a 556 or 300blk upper, would you also have to swap the buffer? Or could you use the same buffer?

[@ThinLineDefenseCo]

Same, all standard milspec. We're not fans of playing the buffer spring and weight swap game. -Walsh

[@Hamrik_Oswald]

@ThinLineDefenseCo awesome, thank you much. Some sources said you had to swap and some said the springs and weights could remain.

[@Hamrik_Oswald]

@ThinLineDefenseCo in addition, what buffer weight would you recommend if you wanted to swap back and forth between a 300blk and a 9mm? I am very new to ARs, so I am not sure if the questions I ask are dumb or not. Haha. Thank you for the help.

[@ThinLineDefenseCo]

I'd go the standard buffer tube if you can. For the 300blk you may need an H2 to slow the system down. But 99% of the time you don't need that. Swapping buffer tubes with the upper is more obnoxious the more times you do it too. -Walsh

[@Hamrik_Oswald]

@ThinLineDefenseCo perfect, thanks again. That makes my decision much easier. I was stuck because of the buffer weight concern.

[@FaithWRanch]

How is the reliability with the converted mags?

[@ThinLineDefenseCo]

Perfect. I think every teammate has this setup now. No issues after a few years. -Walsh

[@maxcole3930]

I found the banshees for only 1250.00 & the new dissents for 1645.00 online. Plus I had a coupon codes that save me another 200! So I got my Dissent for a decent price!

[@edalzapiedi1898]

Where did you buy from?

[@Godfatherdeuce662]

Thank you. You answered all my questions about my build

[@bkg2213]

Would an Aero lower work with a CMMG upper?

[@ThinLineDefenseCo]

It should, a lower is just a lower

[@bkg2213]

Ok. Thank you for the reply.

[@zodaguado6655]

It won’t work per cmmg reddit

[@luckyguillermo1615]

Hello do I need to buy the cmmg barrel if I already have 9mm barrel

[@coldsteel4]

Yes you need the CMMG barrel to work with the BCG.

[@jfeliciano1172]

Any range footage of this build??

[@ThinLineDefenseCo]

kzbin.info/www/bejne/rmbPoJ6oorB_nc0

[@jfeliciano1172]

@@ThinLineDefenseCo Thank you sir!

[@grassshadow1]

I'm still watching the video, but I'm impatient...does he say how much it weighs total?

[@ThinLineDefenseCo]

yea he does... if you have nothing on it, not a lot .... just like every gun -Walsh

[@FrostyDeagz]

The gun candy color always has purple in the examples, yours doesnt look purple at all in this video... does it look purple in real life?

[@ThinLineDefenseCo]

It does. The camera and the light does some interesting things but you see the purple in the sunlight.

[@FrostyDeagz]

@ThinLineDefenseCo thanks.. I love the look on camera... I've been looking at blue titanium as a cerakote... but every video I see seems to have a different looking blue titanium too so idk which color is accurate

[@Hamrik_Oswald]

Seems like this idea of theirs came about for people like me that have an ar15 lower but want a pistol caliber.

[@mikehawkswollen5819]

207st!

[@ThinLineDefenseCo]

Harry!!!! Miss your face! - Not Jason

[@Ironsight_Army]

Insert popular opinion here

[@zacharyfett2491]

Counter with unpopular opinion response.

[@christopherrobin8134]

Olights are the big gay, change my mind.

[@ThinLineDefenseCo]

Hahaha...I love that Joe lives rent free in your head - Not Jason

[@christopherrobin8134]

@@ThinLineDefenseCo I love Joe. But the memes must be passed on. Just as our forefathers passed them on to us.

[@ThinLineDefenseCo]

This is the way - Not Jason

[@christopherrobin8134]

@@ThinLineDefenseCo This is the way.

[@zodaguado6655]

I judge every dude by how their girlfriend or wife looks,,, or if their children are ugly 😂😂😂😂😂😂😂😂

[@expectmore-]

Hey @ThinLineDefenseCo Clickbait title dude. When you have an Aero upper Aero Lower Aero handguard A2 pistol grip DONT TITLE YOUR VIDEO CMMG anything. That piece is less than 10% of all the items on this AR GEEEEEEZZZ

[@ThinLineDefenseCo]

besides the entire barrel, bcg, and magazines. If that's 10% of your firearm you're doing some pretty stupid things.....this comment makes me dumber -Walsh

[@sgtbeef]

Did you have to switch out the buffer to a lighter version?

[@ThinLineDefenseCo]

Nope, carbine spring and buffer.

[@sgtbeef]

Cheers 🍻