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CMMG 22LR M4 Profiled Barrel and Collar Kit
$224.95 $209.49 Save $15.46
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Most Helpful Positive Review CMMG 22LR M4 Barrel and Collar kit.
I am more than pleased with this combo. I made one of my ar uppers into a designated 22lr, very nice. Reliable, and better yet, she shoots about 1" to 1.5 at 100yds with CCi standard! Not bad. Definitely recommend. Thanks, Dave
Most Helpful Negative Review zero stars. completely inaccurate at 25 yards.
This barrel was so inaccurate it was almost impressive. I torqued the barrel nut to milspec and tried multiple reliable optics, but at 25 yards my shots bounced around from 2" off to 6" off up and down and left to right. You literally couldn't hit the broad side of a barn if you tried. It functione...
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The barrel was too short

by Jake De Muss, from New Zealand Written on July 20, 2025
The advertised 16.1" barrel length was deceiving.

The 16.1" length was measured from the tip to tip with about 1.5" of the barrel inside the upper receiver, so the 15.5" hand guard that I purchased for it was too short. The barrel and thread didn't protrude out of the hand guard.
Would recommend: Yes
Was it helpful to you? Yes | No

Easy to install and works great

by Wesley S, Verified Owner from CO, United States Written on March 4, 2025
Converted my CMMG 22lr kit to a dedicated upper and this was a quick and easy to install barrel and collar that has helped to make that happen.
Would recommend: Yes
Was it helpful to you? Yes | No

Light strike 50 percent of the time

by John, Verified Owner from VA, United States Written on March 22, 2024
I was running a CMMG conversion on a .556 barrel and had zero problems. I switched to the CMMG barrel with collet and half the time I get light strikes and failure to fire. I have the barrel installed correctly and tried different firing pins and springs without any resolution. POS product will give you issues like many other buyers.
Would recommend: No
0 of 1 found the following review helpful.
Was it helpful to you? Yes | No

dedicated to success

by Edmachi, Verified Owner from TX, United States Written on February 17, 2024
Really like this barrel with colar for my Ar22 build. Add a bolt and you are good 2 go
Would recommend: Yes
Was it helpful to you? Yes | No

Works as intended

by Vasea, from VA, United States Written on December 12, 2023
The Collar Kit fit the CMMG 22LR converter very well. I used the items for an AR-15 dedicated 22LR upper, and so far the accuracy has improved over the standard converter. Would recommend!!
Would recommend: Yes
Was it helpful to you? Yes | No

Best 22LR Conversion!!!

by xEXPLICIT RAEx, Verified Owner from WI, United States Written on February 7, 2023
So far I am loving this barrel! Fits very nice snug and flush in the Upper Receiver!!! Group so far on red dot standing 1 moa definitely can get better!!!! Definitely get the borebuddy reliability kit! Since bolt has bounce and will fix any problems!!
Would recommend: Yes
Was it helpful to you? Yes | No

Fail to fire/light strikes and average accuracy

by BPM, Verified Owner from ME, United States Written on October 7, 2022
First time I pulled the trigger, fail to fire. Rim of that round had the lightest strike I've seen. The adapter that fits over the snout of the barrel wasn't flush, it was set back causing the light strikes. Over the course of the next 200 rounds there were over 20 more fail to fires. Accuracy was okay. I was hoping it would be more accurate than the CMMG kit using a 5.56 barrel. Using the same ammo in both, they are about the same. Maybe I got a bad one. If the accuracy at 100 yards is no improvement over the CMMG kit and 5.56 barrel, I'll probably return it.
Would recommend: No
0 of 2 found the following review helpful.
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CMMG, Inc 16.1 inch .22 LR M4 Profiled Barrel and Collar Kit

by Pistol Pete, from NC, United States Written on May 19, 2020
This is the perfect kit for your dedicated AR-22 build. The CMMMG 22LR Bravo conversion kit I purchased came with the .223 insert cartridge. When I decided to build a dedicated 22 upper the CMMG Barrel with the collar were a perfect fitment. The result was a perfect AR 22 in fit and finish. The barrel is amazing, and the collar takes five seconds to install.
Pros:
  • High quality and reliability
Cons:
  • None
Best Used for:
  • Dedicated AR-15 .22LR upper.
Would recommend: Yes
1 of 1 found the following review helpful.
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Nice product

by Mike B, Verified Owner from NH, United States Written on September 30, 2017
Used for a dedicated AR upper with CMMG bolt carrier and charging handle. Nice finish on barrel great accuracy great price. Great for economical training with .22LR ammo. As always great price, service and shipping from Optice Planet.
Best Used for:
  • Training and plinking
Would recommend: Yes
Was it helpful to you? Yes | No
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