CMMG .22LR AR15 Barrel and Bolt Conversion Kit – Multiple Lengths

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CMMG .22LR AR15 Barrel and Bolt Conversion Kit

This kit is designed to help you convert your existing upper to a dedicated .22LR quickly and easily. With the barrel and bolt group kit, all you need to do is purchase a magazine and you’re ready to go. The kit includes all the necessary components to make the conversion seamless.

It’s important to note that for optimal performance, a round-style hammer should be used as notched hammers can cause function issues. Additionally, 36-grain plated nose bullets have proven to be the best choice for function. The kit’s barrel twist of 1:16 and barrel profile are for providing you with reliable accuracy.

Its high-quality barrel material and twist rate ensure that your shots will be accurate and consistent. The 1/2×28 muzzle thread allows for easy attachment of your preferred AR-15 muzzle device.

The Barrel and Bolt Group .22LR Kit is the perfect addition to expand your firearm collection and capability. Available in multiple barrel lengths to get the exact size for your custom build in mind. Its ease of use and reliability make it a great option for anyone looking to convert their existing upper to a dedicated .22LR.


  • Brand: CMMG
  • Caliber: .22 LR
  • Barrel Twist: 1:16
  • Barrel Contour: M4
  • Barrel Material: 4140CM, SBN
  • Muzzle Thread: 1/2×28
  • Length: 4.5, 9, and 16.1 in
  • Color: Black

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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 1 review
dimitry aronsky
Best Kit Out There

Can't Beat CMMG

Thank you for the kind words! We're glad to hear that our CMMG .22LR AR15 Barrel and Bolt Conversion Kit - Multiple Lengths is the best option out there.