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CMMG Drop-in .22LR AR-15 Alpha Conversion Kit with 25-rd. Mag. SAVE BIG!Shoot more, spend less! You can turn your .233 Remington® chambered AR-15 into a .22LR and plink away without spending a fortune on ammo. Fire away: Phosphated kit Included 25-rd. Mag with bolt hold open follower Piston system compatible For best performance, use a round-style hammer and 36 grain bullets. All the fun of shooting your AR-15 without blowing up your shooting budget! Order now!
SKU#: WX2-623511
UPC#: 852005002004 ($152.99)

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Comments (26)

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Sorry but I would never buy anything like this. Why try to modify an upper receiver and barrel designed specifically for .223/556. Nothing good can truly come out of this thing. For one all the horror stories of gouging out uppers are all over the web. Then you have the issue of "tumbling bullets" bouncing down your barrel basically ruining it. The risk/reward is just not there in my opinion. If you want to shoot .22 from the AR platform then either buy a complete dedicated .22 AR rifle, lord knows there dozens available. The other safe option is to buy a dedicated .22 caliber upper with bcg, etc. A simple 10 second swap and your good to go! I know complete .22 uppers can often be found for less than $250

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Can you shoot this with a can attached?

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Do you have to adjust the gas piston when switching over to 22lr

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The action works solely off of recoil, nothing to do with gas. Drop in and fire, e z does it

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Not at all being this is designed to be used in a standard AR. Mine worked perfectly in two different 16" rifles; one with a carbine gas system and another with a mid-length, and also did great in a 10.5" pistol that had a carbine gas system but with the shorter barrel probably had less back pressure. Great product however I have since sold it as anytime I wanted to shoot 22LR out of an AR I would always get my 15-22. Was not getting the use it deserved.

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Buyer Beware! The bolt will gouge out the inside of your upper receiver! Stainless CMMG conversion kit bolt has 2 pins in it and they both walked out while firing my rifle. The side cotter pin is too long and sticks out. It carved a deep gouge into the inside of my upper receiver. Since shooting 22 ammo is relatively dirty, I didn't notice the damage that was being done until I broke down my AR to clean it later that day. There were metal fragments from my receiver all through my gun - even down in the trigger assembly. CMMG "fixed" the kit. They would not replace it. They did replace my upper receiver after much back and forth. After supposedly being fixed, I took it out again and a different pin (on top this time) walked out and destroyed another upper receiver after inspecting it following only 20 shots!!! CMMG would only send me 2 cotter pin replacements and got nasty with me through email. Told me they would no longer honor the warranty. All of this happened with only about 200 rounds down range on a very expensive AR which never had a single problem before this kit. I bought mine before the slump. Just spring for a dedicated 22, which are dirt cheap right now, and save yourself a bunch of aggravation.

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I've heard a few stories about this issue, enough to change my mind about risking my go to "life n liberty" rifle just to shoot 22lr. Thanks for the info.

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I bought one a couple months ago. I love it. Used it with 16" and 10.5" barrels. After loading the magazine you HAVE to tap it to seat the rounds properly otherwise you will get failures to eject.
This company is awesome. The 5.56 casing that the .22LR round sits in cracked after much use and abuse. Contacted CMMG about it and their response was "new ones in the mail". No questions asked.

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It's too bad that it isn't offered in a "no mag" version for those of us living in benighted areas w/ a 10rd [or less] mag limit. Lots of 10-rd versions of MSR 22lr mags to be had out there, but nobody seems to offer the conversions w/ less than an attached 25rd mag*, so unshippable. :-p

* That is, at less than a "shakedown" price, to profit from others' misfortune...

1 vote
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I'd go with the bravo (stainless steel kit) + 3 mags from lambo's post below by woohoo2. The alpha kit has been phased out by the bravo.

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I had one of these for quite a while, me and my sons put a few thousand rounds downrange with one of these adapters. Accuracy is OK, not much worse than a dedicated 22lr. As mentioned, your sights will be off when you want to switch pack to .223 or 5.56.

If you shoot a whole bunch of 22lr, be sure to shoot a few rounds of .223 to clean out your gas tube. A buddy of mine ran nothing but 22lr in his AR for a long time, when he switched back it was a bolt gun. The gas tube was clogged with debris from dirty 22lr. It will also make a horrible mess inside your rifle.

A far as being reliable though, I never had any issues and the kids loved it. I've thought about buying a cheap PTAC upper and using one of these conversion kits for a dedicated 22lr upper.

4 votes
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Found this looking for extra mags. This the stainless version with 3 mags for $185. Debating whether to cancel my Sportsman's Guide order.

https://lanbosarmory.com/index.php?main_page=product_info&cPath=117&prod...

2 votes
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I did. Thanks for the heads up on this by the way.

1 vote
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I had one of these years ago and got rid of it shortly after acquiring it. While it never malfunctioned there were other issues to consider. Accuracy was subpar since 22LR bullet is considerably smaller then 223/5.56 projectile. Swapping in a 22LR bolt also meant your BUIS and optics were no longer usable since they were dialed in to a different caliber.

1 vote
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It'll fit and fire, but as you mention accuracy will be sacrificed. This would be like shooting a 9 mm through a .40 S&W barrel...will it fire, sure, but it'll be bouncing all up and down the insides of the (overlarge) barrel...and it probably won't do any favors to the rifling inside the barrel either.

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Well, no, it won't: it will more be like firing 9mmP in a .38S&W revolver. The problem here is less the bore difference [.224 vs. .221" normal for 22lr; the soft lead bullets in 22lr "bump up" to cover most of that diffference] than the gross overstabilization [even an original M16 has a 1:12 twist barrel, just about right for Aguila SSS, but way too fast for regular 22lr, which has best accuracy at the standard 1:16 twist.] Most MSRs have 1:9, 1:8 or 1:7 twist barrels, which doesn't do the 22lr any favors, altho' better too much stabilization than too little, as far as accuracy at range goes...

2 votes
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So I won't be competing in the Olympics....check. BTW, aren't you exaggerating ever so slightly about the bullets "bouncing" down the barrel? The difference in diameter is .002" between 22LR and .223. Probably within tolerances of many lower end ammo.

3 votes
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You should buy one and find out. You seem like the type that needs to pay to learn rather than just listen.
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My 3 mag kit showed up today; fired 60 rounds (mags stopped being easy to hand load at 20 so I just loaded up 20 per mag)....not a single failure out of my 10.5” Radical pistol with a Shockwave brace and managed 2 inch groups at 40 yards. This was rapid-ish off hand shooting with a red dot. Pretty freaking good IMHO for something “bouncing down the barrel” and whatnot.

Thank God I didn’t listen to a bunch of Negative Nancy’s with ZERO EXPERIENCE WITH THE PRODUCT and LEARNED what a good product this is.

2 votes
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Testosterone. Please regale us with your Delta Operator experience regarding the .22lr conversion kit. Wait... Really not interested.

1 vote
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I actually have one on order from the link I posted from Lando's as I was able to cancel the single mag non - stainless model in this post (still a solid deal though)

For the record I do not "listen" to advice from people who have obviously never used a product and are simply repeating crap they heard at the range or from a gun store scuba ninja in one of those ever so enlightening "I know a guy" stories. I'll report back to you about how the 22LR bullets "bounce around" a barrel 0.002 inches larger than the bullet itself or the fact I cannot get 10 inch groups at 3 yards. I think the 4 out of 5 star reviews posted damn near everywhere speak for themselves but I will use actual hands on experience to form an opinion.

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These work great, (I've had mine for about 3 years)!, the donkey na-sayers as you put it have zero experience. Minimal accuracy loss with this conversion, I typically use match grade 22 ammo and they shoot very straight out of these kits. It's not too much work to figure out where your sights need to be adjusted going back and forth from 223/556 to 22. One of the better purchases I've made and highly recommended.

1 vote
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Took a gamble and ordered. Hope this works in my 10.5 inch AR. Anyone know where to get cheap mags?

The description on Sportsman's Guide says this works in ".233 Remington chambered AR-15" What is .233 ;)

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Thanks!

1 vote
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Anyone have experience with this? How accurate is it and how reliable is the feeding?

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