$289.99
2 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
CMMG built this kit for one straightforward goal: give AR-15 owners a real dedicated .22LR setup without buying a whole new gun. The kit pairs a 9-inch barrel with a matched bolt group, so you can convert an existing upper into a rimfire shooter that runs like a champ. This is the affordable answer to burning through ammo at the range, since feeding an AR with .22LR costs a fraction of running 5.56 all day.
This is a dedicated barrel, not a chamber adapter that squeezes into your 5.56 bore. The 9-inch barrel is a Medium Contour Taper cut from 4140 Chrome Moly with a salt bath nitride finish inside and out, which fights corrosion and makes cleanup easier after a dirty rimfire session. It runs a 1:16 twist tuned for .22LR and a sporting chamber, with the muzzle threaded 1/2×28 so you can add a brake, flash hider, or other muzzle device. Because it is a true rimfire barrel, there is no gas block or gas tube involved. Rimfire runs blowback, so all the fouling vents out the muzzle instead of dumping back into your receiver and buffer.
Installing the barrel works just like fitting a standard AR-15 barrel, so if you have swapped a barrel before you already know the drill. The bolt group is matched to run in any mil-spec AR-15 upper receiver and feeds from CMMG's 22ARC magazines, which are sold separately. CMMG recommends a round-style hammer since notched hammers can trip up function, and 36-grain plated nose bullets have proven to be the most reliable choice.
Folks who go the dedicated-barrel route tend to report tighter groups and smoother function than the old drop-in conversion units. It is a smart pick for high-volume practice, teaching new shooters the fundamentals, or just having a low-cost blaster that mirrors your everyday AR. Backed by CMMG's limited lifetime warranty and made in the USA.
No, a magazine is not included and is sold separately. The kit is designed to feed from CMMG's 22ARC magazines. Once you add one of those, you're ready to load up and shoot.
It is not. This is a dedicated .22LR barrel with a true rimfire chamber, not an adapter that fits inside a 5.56 bore. You install it in place of your existing barrel, so you're building a dedicated .22LR upper rather than converting one on the fly.
No. Rimfire runs on a blowback system, so there's no gas block or gas tube required. That also keeps fouling venting out the muzzle instead of blowing back into your receiver, which means less gunk in the action and easier cleanup.
CMMG recommends 36-grain plated nose bullets for the most reliable function. Pairing that with a round-style hammer keeps everything cycling smoothly, since notched hammers can cause function issues. Standard bulk .22LR will run, but sticking with the recommended load gives you the best results.
| UPC | 815835016078 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 22D8FEF |
| Shipping Weight | 1.81 |
You must be logged in to post a review.
Reviews
There are no reviews yet.