CMMG AR-15 .22 LR Stainless Steel Conversion Kit + One 25 Round Magazine – Bravo Series

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Spend a day at the range without spending a fortune!

The CMMG Stainless Steel 22LR Conversion Kit with 1 Magazine.

This CMMG .22LR conversion kit allows the use of inexpensive .22LR caliber rim-fire ammo in your AR15. You can install this in 30 seconds, but just removing the standard bolt/carrier group from your AR and replacing with the the included .22 bolt device.

This unit is blow-back operated and allows semi-automatic firing.

The CMMG .22LR magazines have a bolt hold-open follower. This kit includes a gray-colored 25-round magazine.

Use with AR’s chambered in 5.56/.223 only. Compatible with piston-systems.

CMMG AR-15 .22 LR Stainless Steel Conversion Kit

Frequently asked questions:

Q: Does this kit work with a .223/5.56 AR-15?

A: Yes! The barrel for a .223/5.56 is very close in size to a .22lr barrel – 3/1000″ larger. This kit allows for shooting of a .22LR from a standard AR-15 upper. A dedicated .22LR upper can also be used, and it will typically increase accuracy somewhat. Most users report that this kit results in 3-4 MOA accuracy (1.5″-2″ groups at 50 yards) with a .223/5.56 upper. Generally, the slower the twist rate on your AR-15 barrel, the better the accuracy with a 22LR round.

Q: Can this kit be used with a dedicated .22LR upper?

A: This kit can be used with a dedicated CMMG .22LR barrel, but you’ll need to purchase this part, and swap out the collar on the bolt – this will convert it to a dedicated .22LR bolt.


  • CMMG .22LR bolt carrier group assembly (stainless steel for superior durability)
  • One 25-Round .22LR Magazine (fits in AR mag well)

Here’s a video that shows how easy this drop-in kit is to maintain!

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

CMMG Warranty

Seller warrants to Buyer that for a period of 6 months from the Delivery Date, all Goods will be:

  • Free from any defects in workmanship, material, and design
  • Conform to applicable specifications[, drawings, designs, samples and other requirements specified by Buyer]
  • Fit for their intended purpose and operate as intended
  • Merchantable
  • Free and clear of all liens, security interests or other encumbrances
  • Not infringe or misappropriate any third party’s patent or other intellectual property rights.

Inspection and Rejection of Nonconforming Goods

The Buyer has the right to inspect the Goods for a period of thirty (30) days after the Delivery Date. Buyer, at its sole option, may inspect all or a sample of the Goods and may reject all or any portion of the Goods if it determines the Goods are non-conforming or defective.

If Buyer rejects any portion of the Goods, Buyer has the right, effective upon written notice to Seller, to:

  • Rescind the Order in its entirety
  • Accept the Goods at a reasonably reduced price
  • Reject the Goods and require replacement of the rejected Goods.


If Buyer requires replacement of the Goods, Seller shall, at its expense, promptly/within 30 days replace the nonconforming Goods and pay for all related expenses, including, but not limited to, transportation charges for the return of the defective goods and the delivery of replacement Goods.

If Seller fails to timely deliver replacement Goods, Buyer may replace them with goods from a third party and charge Seller the cost thereof and terminate this Order for cause pursuant to Section 20.

Any inspection or other action by Buyer under this Section shall not reduce or otherwise affect Seller’s obligations under the Order, and Buyer shall have the right to conduct further inspections after Seller has carried out its remedial actions.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 134 reviews
So far so good

So far it is a tack driver. I jave shot .22 rifles before but this is so much better, i have noticed that sometimes a casing will get caught when the new one is being loaded, May jist need to be broken in. The mag is also loose and wobble not sure of this could also be the cause but will contine to shoot amd monitor.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Hopefully yours fits 2.

I ordered a regular conversion kit and received one that was for a left handed rifle… and have left emails but yet to get a response... I would just like to exchange my 10 round mag and left hand bolt in original packaging for the exact same 10 round mag and right hand bolt… nowhere else on the packaging does it say left handed and I have had it in the package for a few months now. Just tried to put it in today… and was so disappointed to see a forward assist on the left side and metal covering the ejection port. I was SO excited to and want it to work still so please get back to me so I can change my review to a 5 star.

So sorry to hear about the issue, Jack. We sent you an email to resolve the issue.

Patrick Brown
CMMG Bravo 22lr Conversion

This thing is awesome. Operates flawlessly. 300 rounds so far no hickups, Accuracy is great for what it is! Hitting bottle caps at 45 yards. Fast Shipping from AT3!!

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Elizabeth Johns
Hopefully yours will fit.

I ordered 2 of these and one was 7/8” wide and it fit perfectly. The other one was 1” wide and it would not fit. They were in the same exact packaging. I contacted AT3 after we tried them both out and the rep said he would contact CMMG the maker. I waited a week and then contacted AT3 again, this time I had to leave a message and I still have no answers. Would at least like one that will fit or a refund.

So sorry to hear about the issue, Elizabeth. We sent you an email to resolve the issue.

Michael R
Couldn’t be happier

I finally got out to the range with my new conversion kit….I was able to shoot through a 500 round box of .22 LR and I experienced 0 issues or malfunctions.

I literally could not be happier. This thing is exactly what I hoped it would be. Shooting .22 is currently like 1/15 the cost of shooting .223….So this conversion kit will allow me to get a ton more time on my AR’s. And quite frankly, will pay for itself in short time when the ammo savings are factored in.

I was a little surprised at how dirty my AR for. Especially the lead fouling in the barrel. But that’s not the conversion kits fault, it’s just what you get with .22. And I’ll try some different ammo to try and help with that issue. Overall, I’d recommend this to anyone considering it. But get extra mags, you’ll want and need them!

Thanks for sharing your feedback! We're glad you're satisfied with your purchase. Cheers!