Just returned a CMMG .22LR conversion. Opinions?

Did you try any other 22LR ammo in it? Similar group sizes?

I run a Cinear Conversion in a Colt 10.5" on my SBR and it's a fun accurate plinker with most decent 22LR ammo I've run through it.

You probably jumped the gun returning it after having tried only one type of ammo.

I ended up buying a dedicated AR15 in .22. It is the CMMG Quebec. I love it but mainly because the barrel is a 1 in 16 twist made especially for a .22. Two things I love about it is the exposed barrel is 14.5 inches. It isnt a SBR because of 1.5" adapter inside the upper. So overall lenght is the same as an issue M4A1. The other is the feel of it. It is a mil-spec lower and an aluminium upper. That was my biggest issue with the M&P 15-22 was the polymer design. Dont get me wrong, the S&W was a great rifle. Now the bad, the only thing I cannot stand is the factory CMMG magazines. I use 27 rd. BlackDog's with metal feed lips. Other than that is is a great rifle. I paid about $475 for it and am really happy with it. But that is only because I swore off conversions due to accuracy and gas tube clogging issues.

I have a Ceiner(sp?) .22 drop in that is acceptable. I really was not looking for anything other than tin can accuracy and it has done that with every ammo I have tried.

the count said:

Actually I did shoot another brand of ammo as well, Federal bulk. Did not mention that because CCI mini mags are really high quality and if those don't work... Strange that nobody so far stated actual groups they are getting with their conversion. "Happy with..." and "good plinking" doesn't give me anything to compare my groups with

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I've never measured groups with mine and I'm not in the habit of creating facts out of thin air, so no group measurements from me. Sorry about the lack of useful info.

Glad to hear you tried a couple of .22 loads before returning the rifle.

Kind of reminds me of an old Bersa model 223 pistol I had. I tried about 15 seperate manufacturer's .22 loads before I found one that would cycle the pistol reliably. .22LR can be pretty ammo sensetive sometimes.

On the other hand, my Sig 522 devours anything I stuff in the magazine.

Don

I normally shoot a 1 1/2-2 1/2" group shooting offhand at 20 yards. But this is with the dedicated and not a conversion. The 1-16 twist .22 barrel makes a world of difference. The only conversion I have shot did about double the group size... This was the "blued" conversion made by CMMG, in a 1-7 twist 5.56 barrel.

Well I hope to get outside this weekend and do some sho-nuff shooting. I will make a point of shooting some actual targets from a rest and give some idea of what the conversion does in my gun.

Do you like the Ciener conversion? Does it hold the bolt open after the last round? I haven't had any run ins with them. I always see that the same magazines fit both.

I have a CMMG dedicated upper. The barrel with a proper twist rate should play a role in accuracy. Honestly can't tell you. The smallest thing I shoot at are two inch plates, I haven't shot it for groups yet.

I have 2 CMMG dedicated .22lr M4s. They're pretty reliable with Rem T-bolts, but neither can shoot a group to save their lives.

Staying on a 8.5x11" sheet of paper is the best you can hope. That's with a 3.5x Acog.

Also, the magazines are extremely difficult to load, even with the loading tool, past 15 rounds.

I also have 2 S&W M&P-15/22s. Both of these are reliable and can group nicely. Mags are very easy to load.

I do miss the ease of loading the M&P mags... I cannot complain about the groups mine shoots, I can say however it hates Federal Bulk ammo. It has atleast one a magazine that fails to eject. I shoot CCI Blazers and Mini Mags and get great results though.

The Ciener does not hold the bolt back when the last round is fired. Loading the hi-cap mags is a pain for sure but I have not tried any of the loaders available. M&P mags have the button on the side that makes loading much easier.

To add, I noticed that both of my CMMGs have, what appears to be a chamber insert that is not completely concentric with the barrel's rifling. Looking from both ends, you can see a small ring about where a .223 chamber would end.

Yes, these are both factory CMMG dedicated .22lr M4s. Those 8.5x11" groups were from a sandbag rest at 50 yards, BTW.

I wanted to like the CMMG guns, because they're the same weight and feel as a COLT M4, but with groups like that, they are worthless to me.

That sucks. I really love mine. I dont doubt you one bit. I would let CMMG have them back. I can centerpunch a man sized standard target with mine all day long. I mainly shoot 20-25 yards with it, but this is off hand. I would think they would fix them or atleast try. Mine is the "elvolution" Quebec model, but I am sure they are the same. Here is a photo of the insert in mine, but mine joins squarely up to the barrel. Is this what yours looks like?

As I said mine is a 1 1/2-2 1/2"@ 20 yards. That isnt great but it is as good as my M&P 15-22. Both seem to perform almost the same.

I have a .22 conversion kit that I run in my Bravo Co. Midlength AR. with bulk high velocity 22 long rifle ammo I get about 3" to 4" groups at 25 yd. This is good enough for my purpose of practicing CQB type drills on multiple full size targets.

60 gr. Aquila Sniper Subsonics give me 1" groups at 25 yd. and are very reliable However, they tend to be a bit more expensive than the Federal bulk pack I usually run.

I have other .22 LR rifles for precision. The conversion kit's sole purpose is to increase my AR trigger time at minimum cost. It lets me experience the optics, trigger and overall manual of arms of my AR for far less money than 5.56 ammo will allow.

I guess I'm different that I don't equate .22 AR conversions w/ being accurate .22 target rifles. They are what they are. Fun and cheap way to shoot .22 out of your AR at short distance. I have a stainless CMMG and like it for what it is. A short range conversion, fun to shoot but not going to be a tack driver.

If I want to be accurate w/ a .22, I get out my Savage TRR SR.

I have the CMMG and it has always been fantastic. It will shoot anything as long as you run it wet...which is the same way I run it centerfire. I have just never been one to run my ARs dry.

I have a DPMS dedicated .22lr upper in a bull (heavy) barrel configuration. This became available about December 2011 (DPMS released another conversion a few years early that did not do well) They had 2 styles avalable in late 2011, one with sights and normal (m4), one heavy barrel and no sights (bull). It uses Black Dog magazines. Like said earlier they are not as easy to load the magazine as the M&P Smith and Wesson ar.22 but its not horrible. The accuracy at 50 yards is great. I put a 4x14 40mm Cabelas scope with side focus. 2" groups @50 yards on bench with sand bag. It has exceeded my expectations. I mainly use cci Blazer ammunition.

DMH

The Ciener does not hold the bolt back when the last round is fired

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Sorry for this bad information but the Ciener DOES hold the bolt open after the last shot with the 25 round mags. I did not have the 10 round mag with me to verify. I guess I was thinking about my 10-22 tacti-cool or maybe I just was not thinking at all.

I shot 250 rounds of Blazer ammo through the Ciener conversion kit and a DPMS AR with a 2X red dot scope today. After sighting in the scope I was consistently in a 1.5" circle at 50 yards using a Lead Sled with only a few shots outside the circle. It had some trouble feeding Remington bulk in the first mag so I went to Blazer and stayed with it. I shot 50 rounds ar a prairie dog spinning target and was 48-50 aiming mostly at the head. I meant to keep the targets (styro plates with a circle drawn in the middle) and then tossed them before I left.

I switched back to the .223 and emptied a 30 rounder with no problems. At 50 yds I was about 2-3" high with the .223.