CMMG .22LR Conversion Kit Overview 

Just came here to say: CMMG, you guys knocked it out of the park with this product. I have gotten 10x the CQB practice in thanks to this. I’ve used even the cheapest .22 LR ammo in it, from Herter’s, to Remington and Winchester. Absolutely boss engineers over at CMMG. It would be epic if you come out with a 30 round mag to better mimic standard ar mags.

One of my favorite things about my conversion is being able to shoot .22 through a faster twist 5.56 AR barrel. It stabilizes the Aguila 60 grain SSS .22lr very nicely, and is awesome to shoot suppressed.

I love the way he took it out at the end to show us nice touch

I bought one of these CMMG kits about 10 years ago for 25 bucks used in a shop. Came in a brown plastic box that was cracked with two steel 10 round mags. Worked fine in a rifle I put together. I later put a dedicated pistol together and reversed the gas block blocking the port omitting the tube to keep the gasses out of the upper. Stays a lot cleaner. I use several different plastic manufacturer mags in it no issues.

Have had a cmmg 22 conversion kit for a few years, great product guys

Done and done! Kit came and I converted my Banshee yesterday. Can't wait to hit the range!

I love mine. Perfect for handling drills and just plinking. Also, everyone wants to shoot it. Great product 👍

I’ve had a couple of these over the years and I love them.

Just picked on up. CMMG brand. This is so much cheap fun! No recoil, very quiet, and very accurate. It's my favorite mod I have

Just got mine,. this is the best weapon I ever had, the most beautiful, the most fun, the most appreciated by my friends also

This man knows where of he speaks. I have 3 of these and they are a ton of fun and savings. I would recommend using CCI AR Tactical with them for optimum performance, but they do work with other ammo brands. Obviously I am a fan.

Even more fun when suppressed! I have the Adam Arms piston kit on my MSR and it cycles the bolt with no issues. Using standard velocity 22LR the action and hitting the target is louder than the report of the shot.

I got one of these about three years ago, with four magazines. I shoot 300 to 400 rounds every week, and it’s still going strong. The only thing I’ve had to do is replace the firing pin spring. I have one of those ultrasonic cleaners, I take the conversion bolt apart drop the pieces in the basket run it for about 20 minutes and it’s just like new. I bought one for my son the Christmas of 2022, and he uses it every week as well.

Probably the best thing I bought for my AR by far.

bought one of these last week, can't wait to use it.

Love this product, I have purchased 2 for me and 1 as a gift for my brother in law, he loves it. Saves me a bunch of money

I have one and it runs great in a shot out m16 upper I picked up at scrap prices. Very reliable.

Just bought my 2nd one.many pluses.few minuses.really good for wearing in New parts in New builds. Thanks.

Great to have saved me big time 💲 training during cov id🇺🇲👊

Just got my first AR-15 yesterday. Looking forward to installing this first to learn and then to save some bucks practicing. I'll shoot some 223 and 556 from time to time but this kept me from needing to buy both the Z-15 and the M&P 15-22.

Got one of these and love it, told two other guys about it and both were "really?" and went out and bought them.

I bought this set and had a ton of problems in my Ruger AR556, specifically failures to fully eject with the brass getting caught up in the ejection port. I did two things to resolve the issue and now it runs great. 1. Put a little fuzzy side velcro on the top front of each magazine to take up some of the slop, and 2. Purchased an aftermarket charging handle for this kit that does not have the long groove on the underside.

I really like my conversion kit… runs buttery smooth and I’ve never had any failure to cycle or 22LR stovepiping that seems to be fairly typical on a lot of OEM 22LR guns or mags. Great investment and really fun to shoot.

Just got mine still in the package ready to get it out and try it

Cmmg has the best customer service in firearm industry from my experience

I've been thinking of going this way. One of the video;s I saw was to add a Presser Buddy and an insert on the charging handle. One is to take up slack in battery, and the other prevent gases from blowing back in your face. I did not notice when the video was made, so maybe the new stuff is already incorporated!

I fell in love a lot harder when I got that cmmg conversion

Bought it 3 years ago finally tried it today. I highly recommend this purchase mie would only eat CCI STANGERS fortunately I have lot nothing else would work Federal armscor none of it so 20 cents a round not 7 with strangers 0 malfunctions no other ammo would feed

Great explanation thank you

This runs great in my hoffman tactical made parts.

Everyone with an ar15 or ar pistol should buy one. I love mine!

It's worth every penny!

Great addition to my rifle..gives me a lot of hands on for cheap

One of the best companies! I had a failure on the conversion while shooting suppressed full auto with my M16. CMMG sent a replacement part to repair the conversion, no questions asked, no receipt requirements or anything. And they are not afraid to express their faith. Absolutely great folks to deal with.

Bought one a few months back and just installed it this weekend. Unfortunately, it was an absolute bust in terms of reliability. From what I could surmise, the problem appears to be the magazines. My kit has the mags with the red feed ramps and removable bottom plate to access. These have a lot of slop in them when seated in the mag well, causing the ramp trajectory to feed bullets at a steep angle into the chamber leading to FTF. Once the first round fed, the problem would somewhat clear up but never was more than 80% reliable. In contrast, my buddy also bought this kit, but his had different style mags that had orange feed ramps and six (6) screws to take them apart. His kit operated almost flawlessly right out of the box. In troubleshooting, one of the things we did was swap mags, and sure enough that appears to have cleared the issue. I contacted CMMG in hopes I could trade in my mags or at least have them send me the orange followers. Hopefully I hear back from them soon and get this fixed because I really want this kit to work!

I was so about to buy that upper receiver off ur website till I noticed the plastic deflector. Man wish yall kept that metal I would have ordered on the spot.

Best kits ever!!! I give these out as stocking stuffers for Christmas, they are so great!

This is part of buying an AR15 in my view. A 100% must have for sure! You also should buy a Lightin' Grip speed loader.

Have one for a few years and never used it yet.

If your having trouble try adding an extra buffer, quarters or something to take up space in the tube and tighten the spring. It helps stop the spring from causing bounce back. Then get an extra charging handle and fill the back inch with hot glue that will help with powder burns. And don't run for crap I'm ati polymer

I bought this about a year ago, while it hasn't had any failures, I just don't use it that much. I'm not putting the product down or talking bad about it, I just wish I had gotten a 22LR rifle.

Great video. I am going to try to get a couple of those new mags. They look a lot better than the grey beast of a mag I have. Thanks again! Cmmg is an awesome company.

The only thing this video really told me about this product is that it exist. Is it accurate? Is it reliable? Is it or isn’t it depending on the ammo? Idk but it exists 👍

i have one of the new kits, i dont know about it! first price was insane but i found it on PSA for like $160 with 3 mags(by the way are a pain to load), then spent shells keep getting stuck even with the special charging handle, a few failer to eject and after about 500 rounds holy crap is my gun dirty, looks like a 50 year old gun thats never been clean lol,

I’ve had mine for nearly 20 years. There’s a lot of good reasons to use it. It’s your weapon, your optics, your charging handle, your trigger. Sort of think of it as dry firing on steroids

Mine was awesome

Do the Paul Harrel, shoot until you have one round left. Drop mag, put in another and keep shootin'

I just wish they still included them in the brown hard cases.

I have 3 of these and currently buy additional mags for them. Btw, is this legal against the California AWB? Other than the 10 round mag version?

I wouldn't throw away the rubber protector..good to put on if you're keeping in your traveling bag or whatnot

Are these full auto rated for binary trigger setups ??

I bought my kit a few years ago, it was buggy, the magazines fit lose in the well. Kept jamming, I had to add epoxy to them for a snug fit. Haven't used the modified magazines yet....

Can you guys make a conversation kit for 308 to shoot 556 like the colt 901 did

What year did you guys release the 10 round conversion kit? Its awesome!

I got one of the kits but discovered it's a pain with my side-charger. Wish I could use the kit easily.

I keep seeing different answers to this question: What grain and type of ammo have you used and what tends to work best? Id love to keep the price under .08 cents a round with todays prices but i just keep seeing conflicting answers. i have a 16" Stainless Steel Barrel PSA built rifle.

If you have a .22 conversion kit fitted to your AR can you use a .22 suppressor or do you have to use a .223 5.56 suppressor?

It's fun when it works. The most frustrating thing is, the kit is not consistent when it wants to work. Somedays I can go 500 rounds without a malfunction , but others I can't shoot 5 rounds without a jam.

If used with the Catch 22, will the newer magazine engage the catch?

Are those new magazines with the red follower any different than previous generations?

If i simply start immediate actions slap that mag like a latina with attitude rack the slide like your pulling her hair will it cause issues? Basically every reload practice immediate procedures for a malfunction?

I own and have used your conversion kit in the past with good results in general. I stopped after picking up a 15-22. Been looking at your dedicated 22lr uppers which I assume work just like conversion kit without the chamber adapter. Couple questions, since I have a bunch of 15-22 magazines I was wondering if you have tried the Better-Mag adapter in your conversion kits and 22lr upper? Also, with the dedicated 22lr upper what kind of accuracy can you expect with something like CCI MINI MAGs? I ask because with the conversion kit I have noticed I get some back and forth movement inside my upper which seems to open my shots groups up somewhat.

my bolt doesnt like to seat all the way with hollowpoints. is this normal for your conversion kit?

Might be a dumb question, could you use this conversion with a 300 blackout barrel setup, I know it’ll probably be less accurate for sure but besides the case shape I don’t know if it would work or not

I've had mine for a few years now and these things shoot as about as good as any other semi-auto .22, other than maybe an accurized rifle. My favorite thing about it, other than it's accuracy, is that it allows me to shoot 2 calibers with one gun so I have more space for steaks and beers in the truck.

My favorite tv show! 😊

Now I need a .22 suppressor. Dang it! 😏🤭😂

Do you need to shoot a certain grain such as 40 gr?

This doesn't gunk up the barrel? Say you have a really nice, expensive AR-15.. Would you suggest against using this in that expensive rifle?

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Mines a single shot mostly, fails to charge, eject, I've never shot a magazine wo errors, I literally let new people shoot it so they learn safe clearing practices cause that's what they mostly doing when shooting it 😢 tips or tricks to actually get it to work well?

Are the 10/25 mags convertible if legal?

Does anyone know what ammos go good throuh this. Just bought mine and remington golden bullets are jamming alot. Trying cci and winchester next

I have used the right hand kits with no or few problems. I am a gunsmith and have owned my own shop for a very long time. I am a left hand shooter and just received my new left hand kit. IT WILL NOT RUN IN ANY OF MY GUNS !!! I have tried it in FIVE different guns ranging from 10.5 inch to 16 inch barrels none with 556 wyle barrels. I have also tried using the Buddy Kits with no help. Wondering if I just got a lemon ? Not trying to be an ass but Something just ain't right? Help please?

Mine doesn't like Winchester 36g golden bullets. It does 36g CCI Mini Mags just fine.

Okay I would like to know if this conversion kit changes the zero of the rifles sites red dot and iron?

I don't have to convert my barrel? Will the round wobble down the barrel if I don't have the correct bore (the bore being bigger due to it being spec for .556/.223)?

The S&W mags hold open when combined with catch22 gen2 😢 Too bad i have to mix venders because lack of forethought in cmmg mag design.

Can I run these with my surefire RC2?

Will this work with a piston ar? An Adams Arms piston to be specific?

I own one. Only thing I don't like about it is that I have to spend more to get the part for the forward assist to work and I don't like the charging handle that comes with it because it's a bit small. Also why build a .22 LR when you can have a .22 LR and a 5.56 upper?

I bought this and use it quite a bit. Just be aware this will not be as accurate as a standard 22LR because the 556 rifling is different. I had issues with mine out of the box and CMMG was great about getting it working for me. I bought the forward assist piece too because occasionally a round wont feed all the way (especially when the chamber gets a little dirty). Some ammo feeds and works better than others.

Is this kit compatible with PWS rifles with long stroke gas piston system? Specially PWS MK111 Pro?

The answer to the bolt hold open problem is (AR-catch22) look it up. FLAWLESS!

I’m so confused on the battle situation lol , so u don’t need a 22 barrel ?

Will it work in 223 wyle or does this count as standard 223

Good one, but you should say it won't work if someone got notched hammer, it isn't compatible. To make it work you need to replace hammer, or grind the notched one.

I have only one regret about my CMMG Bravo .22LR AR-15 Adapter. That regret is, "That I didn't invest in it a lot sooner than I did." Member of an Indoor Caliber Restricted Range, where Center-fire rifle is prohibited. Nearest Outdoor Range is 2+ hours away. Buying CMMGs Adapter makes my AR legal for use at my club. Our lanes are 60' long, and at that distance, accuracy is as good as any Semi-Auto 22 I own. At the outdoor range, accuracy is still adequate out to 50-75 yards. At 100 yards, the groups start to widen up a bit more than the other semis I own. Is it Match Grade Accurate? No, but neither is a stock 10-22. If you own an AR in 5.56/.223, I highly recommend investing in CMMG 's Bravo Kit. Running a little Rimfire cartridge that costs $0.05 - 0.10 compared to $0.50 - 1.00+ per round means a lot more economical trigger time. The only issue I had was some 6 or 7 year old Remington Thunderbolt ammo, and I blame that on the ammo. It's given me issues in my other .22 self loaders. That's why it's 6-7 years old. I don't buy Remington .22LR at all because it only works consistently in single shot or revolvers in my experience. Has a lot more fouling too. Mexico's Aquila ammo is better than Remington's.

You make a speed loader to go with those mags?

So the bullet is fired through a 223 barrel correct?

Do you also need to swap out the barrel since you're now firing a .22lr?

I wish you would have given the price definitely sounded like an infomercial

If CMMG were to make a .22lr conversion kit that replaces the bolt of a BRN-180 AR UPPER Then they will have truly become the big daddys of utilitarian useful hunting / defense & sport tools . As it is there CMMG .22LR adapter works way more dependably than a 10-22 . They have out done themselves. ¿ Please make a conversion kit for BRN-180 . Also would like to see a .22mag conversion kit for ar-15. & BRN-180 .? Imagine if you had a brn-180 & for some reason the piston system failed you could still use the rifle unaffected in .22lr . And in any 5.56 ar or brn-180 if a bolt lug broke or something like that gas rings ect , u should be able to use the .22lr kit unaffected by that .

Turn your semi auto ar into a bolt action .22 that has no charging handle so you use your keys from your pocket to charge the bolt after every single round that fails to feed every single shot. Spend more time unjamming your rifle than ever before. Super fun times I tried two different rifles that function perfectly, tried 3 different magazine types and 4 different brands of ammo. Still failures to pickup next round/ double feed issues almost every single shot. If you use the magazine as a foregrip and push it up and slightly back you can get the bolt to pick up the next round but it's comically just barely snagging them to where if you don't push up on the mag while firing it will miss the next round completely and you end up with an empty chamber and a sad click when you pull the trigger. Then it's time to cradle your AR like a baby and push in on the mag while using your keys to charge the bolt again in hopes of chambering one this time. Just buy a Ruger 10/22 for 100$ more than this piece.

Will it work in a AR Ruger 5.56? Thanks!

Okay fine take my money

Do they make one for a side charging AR-15

Where can i find the mags alone?

That mag in a 22 Caliber How many bullets does it mag hold

Does it work with a folding stock?