CMMG AR-15 .22LR Einstecksystem (inkl. 3x 25-Schuss Magazin)

A+ on shipping! Ordered Thursday afternoon. Shipped the next day (Friday) Arrived at my house four days later on the Tuesday after Labor Day. Impressive Brownells!

Looked good out of the box, and after reading the pamphlet that came with it, I cleaned, lubricated and inserted it into my Radical Firearms SOCOM 5.56 upper. Unfortunately, the bolt wouldn’t properly seat all the way forward. The brass chamber collar couldn’t clear the chamber entrance.

Obviously I wasn’t going to force it, and even gentle pushing wouldn’t seat it. I then tried it in my Radical Firearms 300BO upper since the cartridge chamber is identical in size, and it wouldn’t seat there either.

My last hope was to try it in a Stoner 5.56 upper I have, and this time it fit perfectly. So I’m not sure if it’s the Radical upper or the bolt itself. I’ve opened a case with cmmg tech support and I guess we’ll see.

Out to the range w it and the CCi ammo I bought. I only bought the CCi because I could try out the high velocity as well as the subsonic from the same maker.

I put a bunch of rounds downrange and it works like a champ! Out of the 100 rounds (1/2 sub & 1/2 super) there were:

• NO Fail to feed

• NO Fail to eject

• NO Double feeds

(I did shoot a few CCI Quiet 22LR and as expected they required manual ejection due to their only being rated at 730fps.)

So far this is a quality kit for a great price ($153 shipped w 3 mags) and I highly recommend it for anyone who wants to let their AR do double duty!

********Of Note*******

I heard back from CMMG tech support and they are aware of the fitment problem with some uppers, and sent me (free) a replacement chamber adapter that they say is the fix. And it was the fix! As you can see from the photo the replacement (on right side) chamber adapter collar is stainless, not brass, and it’s fixed permanently to the chamber ‘pipe’.

It fit perfectly in the Radical Firearms 556 upper, and performed as expected when I fired half a dozen suppressed test rounds in the back yard.

A+ on shipping! Ordered Thursday afternoon. Shipped the next day (Friday) Arrived at my house four days later on the Tuesday after Labor Day. Impressive Brownells!

Looked good out of the box, and after reading the pamphlet that came with it, I cleaned, lubricated and inserted into my Radical Firearms SOCOM 5.56 upper. Unfortunately, the bolt wouldn’t properly seat all the way forward. The brass chamber collar couldn’t clear the chamber entrance.

Obviously I wasn’t going to force it, and even gentle pushing wouldn’t seat it. I then tried it in my Radical Firearms 300BO upper since the cartridge chamber is identical in size, and it wouldn’t seat there either.

My last hope was to try it in a Stoner 5.56 upper I have, and this time it fit perfectly. So I’m not sure if it’s the Radical upper or the bolt itself. I’ve opened a case with cmmg tech support and I guess we’ll see.

Out to the range w it and the CCi ammo I bought. I only bought the CCi because I could try out the high velocity as well as the subsonic from the same maker.

I put a bunch of rounds downrange and it works like a champ! Out of the 100 rounds (1/2 sub & 1/2 super) there were:

• NO Fail to feed

• NO Fail to eject

• NO Double feeds

AND for those of you using a suppressor, there were zero problems cycling the bolt with CCi 22lr hp subsonic ammo (1050 FPS) and a carbine length gas tube on my Stoner.

So far this is a quality kit for a great price ($153 shipped w 3 mags) and I highly recommend it for anyone who wants to let their AR do double duty!

********Of Note*******

I heard back from CMMG tech support and they are aware of the fitment problem with some uppers, and will be sending me (free) a replacement chamber adapter that they say is the fix.

I usually measure my rimfire groups with a caliper at 50 yards. This would have required a yardstick! Can you even call that a group?



I would have settled for an 8" group and just used it for moving practice but over 24" (how much over I don't know because some rounds didn't even impact the back stop). Unusable.

Great finish

Easy install

Cheaper to shoot

Get to use my AR more

Präzision war bei der Sig Patrol besser als bei der Oberland Arms mit dem 20 Zoll Lauf. Funktion störungsfrei bei beiden.
Bei der OA das Original Magazin Bravo verwenden, ein anderes
zeigte Störungen, Klemmer usw..
Die Sig-Patrol funktioniert hier besser .
Bei 200 Schuss keine Störung, auch mit einem anderen Magazin nicht.
Die Verschmutzung war aber wesentlich höher als mit der 223 Rem. Für Putzmuffel nicht so gut...

I have been super-impressed with the function of this kit. Seems to tolerate a wider variety of .22 LR ammo than other units I've owned or had exposure to. I've been running this in an AR pistol and was amazed at how little the point of impact changed at 100 yards going from 5.56 X 45 to .22 LR. The fit, finish, and quality of construction are very good.

This Conversion works very well and is easy to install. Much better than buying some cheap 22 AR. Can be used in the same AR that you have customized and is very helpful for training purposes. Also better than a Dedicated upper since it costs much less.. Very good craftmanship and works. Good Deal from Brownells with the 3 mags and discounts. I tried about 4 different makes of 22 ammo and all worked without any porblems. Also locks back after last round.

Anfängliche Zweifel was die Präzision angeht waren unbegründet. Läuft am besten mit HV Muniton.
Absolut top, macht einen Sauspaß!
Empfehle Kupfermantelgeschosse, dann ist die Laufverbleiung auch ausgeschlossen.

I read a lot of reviews on this kit, some good, some bad. I found one kit at the gun show for $285 (bravo kit, 1 mag). Brownells had the bravo kit w/3, 25rd mags on sale and with the free shipping and promo I got it for just over $160, thanx Brownells. Shipping was fast, got here a day early. As with any new toy and being a big kid, I had to try it out. Right out of the package it slid in like a champ. Loaded 10rds in each mag and went to town, not one problem. No FTfeed, fire, or eject. I shot Federal’s HV, 36g, copper plated, HP rounds from their 550rd value pack. As of tonight my baby girl has eaten 150+ rounds with no issues. I’ll be doing some different range target shoots down at the creek in the near future to check for accuracy. So far I like this kit and feel it’s worth taking the plunge if you’ve been thinking about it. I had to put occasional shooter because I’m not military anymore. Navy, GMG1, Ret.

I read and watched lots of reviews on these CMMG conversion kits and purchased it with some hesitation. Call me crazy, but straight out of the box I through the BCG into the toaster oven to heat it up and properly applied Frog Lube. I wiped it down afterwards and took it to the range the next day, no oil or grease. After 250+ rounds of Thunderbolt, TAC, and Blazer, not a single FTF, stove pipe, or anything bad. The thing just ran smooth as silk. I even tried resting on the magazine and tilted both forward and backward to try and cause a feeding issue.. I could not reproduce any issues others have had. Maybe I'm just lucky. Bottom line, love this thing. 16" .223 Wylde, Spike's lower with the BCM lower parts kit.Trigger spring replaced with the JP reduced power springs, also a great product.

Was really excited to get this for some cheap plinking in a mostly stock MP15, only to find out that I would get a FTF about very 2-3 rounds. The Aguila high velocity wasn't strong enough to overcome the tension of the trigger for a full reset, so the hammer would just come right back down on the firing pin. Luckily the pin spring was strong enough to keep from slam firing, but it would still dent the round.



Tried it on a franken pistol lower with a Brownell lpk, worked like a charm. One ftf out of 150+ rounds.



I lubed up everything before the range, so I know that wasn't the issue. When it works it's a ton o fun, just don't necessarily expect it to be flawless without some tinkering.

Super happy to have this for plinking. I'm running this with cci 36 grain mini mag HPs, 0 FTF with roughly 250 rnds through it. Prior to installing I disassemble it to inspect and lube it. I slightly smoothed the feed ramp at the top where it meets the chamber as it was slightly uneven or lipped. Then dremel polished the ramp and chamber opening to mirror finish. Tight enough groups to consider it worth buying.

This thing is awesome! It happily digests any ammunition I have ever put in it without complaint (even the stuff that my lever action didn't do well with). No recoil to speak of. The biggest issue is that mags are a pain to load. Do yourself a favor and order the McFadden Lightnin' grip for it (Looks cheaply made, but works better than any other loader I have seen). Also, get plenty of ammo, because you are going to need it.

What a great way to turn your AR into an easy plinker for 22LR. It makes your AR easy for anyone in the family to enjoy. You give up a tiny bit of accuracy than a dedicated upper for 22LR, since the twist rate is geared to a higher powered cartridge, but not enough to be a concern. It isn't designed to be a precision shooter. But at 50 yards and under, it's great.

Great for training when you want to give your ears and shoulder a break too.

Right out of package it was flawless shooting the 1st hundred rounds.

I have a Colt AR-15 and this bolt does not operate properly in it. The bolt sticks to the rear and does not complete the cycle. When it does cycle it fails to eject the spent round which gets jammed in the upper or just stove-pipes. I have tried various .22lr brands to see if that makes a difference but the result was the same. I will probably save my $ for a dedicated AR style .22.

When I got this thing I said to myself "Now why didn't I think of that!" I had planned on buying an AR type 22LR until I saw this and I don't regret it. Installation is a breeze and so far it has functioned flawlessly. The only downside is that the magazines are a little difficult to load especially as you get near being full. A speed loader for this magazine would be great but overall it is well worth the money.

This kit is simply amazing. Allows your AR shoot inexpensive 22lr in matter if seconds, just install the 22lr conversion kit and you are in business. Took it to the range and shot about 200 rounds and had 0 malfunctions. Just make sure you clean and lube if before use and you should be just fine. People complain about relativity but so far i have not seen anything to complaint about. Brownless shipped this within 24 hours and i was able to buy it during the black friday week and could not have gotten it for a better price.



Buy this you won't regret it.

A very useful, reliable and cost-effective alternative to full-power centre-fire rifle ammunition. The conversion kit is a straight no fuss, drop-in conversion. It cycles reliably and the low recoil of the 22RF makes it great for fast plinking and tactical practise. 22RF ammunition is furthermore much cheaper than 223 and you therefore get to shoot more for the same expense. All I'm missing now is a quick-loader for the magazines...

Put a 100 40g American eagle through it out of the box, after giving it a dash of oil. Had one FTF, and I'm pretty sure it was the ammo. If it runs good with that stuff...



If you have an AR, this is a must own. And the bundle with 3 mags is the way to go. It doesn't matter what you think about its training value, it is just plain fun. Cheap fun.



And you will be taken back by the quality of this thing. 10/10

Works great with the occasional malfunction. Would not use this for self defense purposes, but this is great for target shooting. This will be fairly accurate with the proper ammunition, with cheap bulk ammunition, you will notice a loss in accuracy, it is significant.



Bottom line, use good ammo, get great accuracy. Use cheap federal bulk ammo, lose lots of accuracy. Works great enough, highly recommend.

I use this to take care of pests like squirrels and possums.

I cannot like this conversion enough. Installed it, dialed my scope in for 20 yards and it makes one hole groups. Works perfect with CCI standard velocity, sub-sonic and mini mags.

I got the Bravo kit in SS and for the money it works perfect and is accurate. When I get a chance I will bench it out to 50 yards. But from my chair and and old mop handle for a rest with a Geiselle trigger in my DPMS Oracle I am delighted.

L-

I had mixed feelings about buying one of these because of it's "mixed reviews" on the Internet. The magazine required very minor fitting to an RRA EO2, and the bolt assembly went in with no problem. The supplied CMMG 25rd, and two 15rd Blackdog mags, feed perfectly with zero failures of any sort - using Winchester 555 bulk ammo. I have not had a chance to formally check accuracy because of the weather, but it is "plinking accurate" at 25 yards using 5.56x45 sight settings.