Stainless CMMG Unit Damaged Upper Receiver

AR Sponsor:

[ARCHIVED THREAD] - Stainless CMMG Unit Damaged Upper Receiver (Page 1 of 2)

Posted: 3/3/2011 6:28:47 AM EDT

The Stainless CMMG .22 Conversion Unit that I recently purchased has damaged my upper receiver. After shooting, I had to forcefully
yank out the unit and discovered a 1.25 inch cut on the left side of the S&W M&P 15A receiver extending rearward from the chamber.
Would really appreciate recommendation from AR 15 savvy moderators. Don't plan to re-install unit anytime soon.

Posted: 3/3/2011 8:41:12 AM EDT

[#1]

need pix

Posted: 3/3/2011 8:59:03 AM EDT

[#2]

Have you called CMMG?

Posted: 3/3/2011 10:01:08 AM EDT

[#3]

It's hard to tell what you are describing without pictures. Did the kit have any feeding issues?
Was it hard to install?
I ask because I really can't comprehend how the kit could cause damage to a reciever.
Dave N

Posted: 3/3/2011 11:05:41 AM EDT

[#4]

Quoted:

The Stainless CMMG .22 Conversion Unit that I recently purchased has damaged my upper receiver. After shooting, I had to forcefully

yank out the unit and discovered a 1.25 inch cut on the left side of the S&W M&P 15A receiver extending rearward from the chamber.

Would really appreciate recommendation from AR 15 savvy moderators. Don't plan to re-install unit anytime soon.

It sounds like you spoke with Jordan a little while ago. Based on the picture you had sent him, there doesn't seem to be anything abnormal. The frame comes in contact with the upper which is normal. Where two metals meet there will be rubbing. This will in no way affect function of your 5.56mm. As Jordan said, if you are still concerned, we are more than willing to take a look at your kit if you would like to send it in.

Posted: 3/3/2011 2:23:33 PM EDT

[#5]

Jordan,
I called Logan and had lengthy conversation; he said he would talk to owners and get
back with me. Why have I not heard from CMMG? Does it take
a posting on AR 15 to get a response to my lengthy phone call to Logan?

If a cut into the upper receiver is normal, CMMG needs
to warn buyers about potential damage to upper receivers
caused by their .22 conversion kits; "Warning: This unit may
damage your upper receiver. This is normal."

Posted: 3/3/2011 2:25:05 PM EDT

[#6]

Do you think it is just the kit I am concerned about?

Posted: 3/3/2011 2:36:25 PM EDT

[#7]

Atchisson conversions have been used for decades.
This is new for me.

Posted: 3/3/2011 2:42:15 PM EDT

[#8]

Can you post pics to give us a better idea of the damage?

Posted: 3/3/2011 2:43:53 PM EDT

[#9]

I need to see the pictures.......

Posted: 3/3/2011 2:49:50 PM EDT

[#10]

CMMG: I left my camera when I visited my newborn grandson last week.
Could you please post the photo that I sent to Jordan at CMMG. Everyone wants to
see the photo, and I would like them to see the normal wear on my upper receiver.

Posted: 3/3/2011 3:34:29 PM EDT

[#11]

I'll tell you the same thing I did on M4. What are you leaving out. It doesn't make sense. 1000's of these have been sold and used with no damage to the receiver. Some anodizing wear, I could understand.
How do you know you didn't put the cut in the receiver when you pryed it out? And if you had to pry it out, did you have trouble putting it in?
Did you force it in at an angle? Was the chamber adapter snapped into the rails?

You want to imply the kit caused this damage but leave details out.

CMMG stands behind thier products and will do anything to help. With uppers and kits selling at the volume they are, it's hard to get back to everyone in a short time. SpecOps and I do the best we can to fill in the gaps. We are not employed by CMMG so we do this on our own time. I'm actually at work right now addressing this.
You want help, change the attitude.
Dave N

Posted: 3/3/2011 3:48:14 PM EDT

[#12]

Quoted:

Do you think it is just the kit I am concerned about?

Based on the photo you sent, there is no reason for concern with the host rifle.

Quoted:

Jordan,

I called Logan and had lengthy conversation; he said he would talk to owners and get

back with me. Why have I not heard from CMMG? Does it take

a posting on AR 15 to get a response to my lengthy phone call to Logan?

If a cut into the upper receiver is normal, CMMG needs

to warn buyers about potential damage to upper receivers

caused by their .22 conversion kits; "Warning: This unit may

damage your upper receiver. This is normal."

There is no Logan employed at CMMG.

Again, metal on metal will result in a rub mark. You will notice additional rub marks where you charging handle rubs against the upper receiver. You will also notice, as you shoot the 5.56m, rub marks from the bolt carrier riding inside the upper receiver. None of the marks from the charging handle, bolt carrier, or our conversion(based on the photo and description received) should cause any alarm.

There was no reason call. If you are concerned about the kit, it is warrantied against Mfg defect. We will stand behind our product. Please send it back for inspection if you like.

Quoted:

CMMG: I left my camera when I visited my newborn grandson last week.

Could you please post the photo that I sent to Jordan at CMMG. Everyone wants to

see the photo, and I would like them to see the normal wear on my upper receiver.

When you get your camera, you can post your pic. I will included a picture of mine instead. I think you will see the similarity. If this isn't a good enough representation, I will pull a couple more rifles when I have time.

..sorry, my FTP isn't letting me sign in. I will have to do this when i get to work tomorrow.

Posted: 3/3/2011 4:22:58 PM EDT

[#13]

Dave N.

Your accusations and implications are ridiculous,
I have omitted nothing,
I did not manufacture the unit that sliced into
my upper receiver.You reallly appear
defensive about the problem I raised. You
may have a vested interest in CMMG
but that does not warrant insulting another
site member.

Posted: 3/3/2011 4:27:44 PM EDT

[#14]

Quoted:
Dave N.

Your accusations and implications are ridiculous,
I have omitted nothing,
I did not manufacture the unit that sliced into
my upper receiver.You reallly appear
defensive about the problem I raised. You
may have a vested interest in CMMG
but that does not warrant insulting another
site member.

Impications? Accusations? Defensive?
Huh?

Posted Via AR15.Com Mobile

Posted: 3/3/2011 4:41:36 PM EDT

[#15]

Quoted:

Dave N.

Your accusations and implications are ridiculous,

I have omitted nothing,

I did not manufacture the unit that sliced into

my upper receiver.You reallly appear

defensive about the problem I raised. You

may have a vested interest in CMMG

but that does not warrant insulting another

site member.

site member.....just 17 post in over 3 years.....hmmmm

Posted: 3/3/2011 4:48:18 PM EDT

[#16]

Tag to see a 'sliced' upper.

Posted: 3/3/2011 4:54:00 PM EDT

[#17]

so where are the pics..

i have 2 cmmg kits and no such
marks

Posted: 3/3/2011 4:54:49 PM EDT

[#18]

Quoted:
Tag to see a 'sliced' upper.

Same here

Posted: 3/3/2011 4:55:02 PM EDT

[#19]

I've dealt with dozens of conversions in many of my 5.56 Rifles. Never seen anything out of the ordinary
caused by their use. You attack one of our Respected Industry Partners here in an open forum and want
our sympathy. You offer a damaging story and haven't got a picture to post? You seriously need to get your
ducks in a row before firing the first shot like this. There are much better ways you could have handled things.
We need a picture. What you accuse this conversion of doing is far from common place. If there were an
actual problem, CMMG would make it right. It's that simple.... No Drama to it....

Posted: 3/3/2011 4:55:50 PM EDT

[#20]

Posted: 3/3/2011 5:12:44 PM EDT

[#21]

Here is a pic of the inside of my upper. The horizontal silver mark opposite the ejection port is the same mark concerning OP.

Posted: 3/3/2011 5:19:03 PM EDT

[#22]

Quoted:
Dave N.

Your accusations and implications are ridiculous,
I have omitted nothing,
I did not manufacture the unit that sliced into
my upper receiver.You reallly appear
defensive about the problem I raised. You
may have a vested interest in CMMG
but that does not warrant insulting another
site member.

IBTBannage

Posted: 3/3/2011 5:21:21 PM EDT

[#23]

My "vested interest" in CMMG amounts to shooting 10's of thousands of rounds through 5 different rifles with either dedicated CMMG uppers or conversions. I have used 6 different conversions in 5 different rifles with no problems, much less "damage".
In the time I have dealt with CMMG over the past 10 months they have went far and above for customer service and satisfaction.
So yes, I do take offense when you attack a company on multiple web sites with accusations and exagerations of "damage to your upper" which as described, is normal wear. And if it wasn't normal wear, CMMG would have made it right without you blasting them on the inter web.
You sound to me like a newbe who has limited knowledge and experience. But I'm standing by for the "Special Forces" scenario.

Posted: 3/3/2011 5:33:11 PM EDT

[#24]

I would describe those marks as normal wear - "rubs"!
My receiver has horizontal "slice."
Listien, I have nothing personally against CMMG. All AR15
shooters are plagued with high ammo prices. I have an issue that I
feel CMMG blew off. I am happy for eveyone that has a
good conversion unit. I am happy for CMMG. It looks like the whole family
is on the site! It has been a fascinating experience.
God bless you too Tiny Tim!

Posted: 3/3/2011 5:34:09 PM EDT

[#25]

What the hell are you talking about? Dave posted that he will make it right with you but you'll went off the deep end and accused him of ridiculous accusations and implications. Where did he say that? You need to settle down, it'll get you farther along in here.

Quoted:

Dave N.

Your accusations and implications are ridiculous,

I have omitted nothing,

I did not manufacture the unit that sliced into

my upper receiver.You reallly appear

defensive about the problem I raised. You

may have a vested interest in CMMG

but that does not warrant insulting another

site member.

Posted: 3/3/2011 5:39:17 PM EDT

[#26]

I visit about four other forums and you have posted about this
in all of them and several threads on each.

You should try to take care of the problem in private with
the company before you cry to everyone. If the company
turns away and tells you to spit in the wind then advertise the problem to the world of guns.

Posted: 3/3/2011 5:40:48 PM EDT

[#27]

The CMMG is the same as every other Atchisson based kit, the CMMG, Atchisson, Spikes, cienier, etc plus the complete uppers and dedicated ar-22that use the same design. Tens of thousands out there at least I would assume. Manufacter warranties typically don't REQUIRE manufactors send you a UPS tag, your usually expected to return your item to them. If its a scratch that does not effect function is not big deal.

Posted: 3/3/2011 5:40:57 PM EDT

[#28]

Ok, sometimes people post that CMMG is a little late on getting back to people on CS issues, but in my experience they make a quality product. You are gonna need to back it up with some pics if you haven't established some cred here. Some of us have beat the hell outta our CMMG's (pic your product) w/o issue...

Posted: 3/3/2011 5:43:52 PM EDT

[#29]

Greyman,
You need to chill dude, post a pic, CMMG is more than will to work with you from the sounds of it.

You seem to have an issue that thousands of other people have not had.

By the way, I am not related to anyone at CMMG or anyone who even knows them.

I just own one of their conversion kits too, and have not had the issue you report.

Posted: 3/3/2011 5:44:23 PM EDT

[#30]

tag

Posted: 3/3/2011 5:45:51 PM EDT

[#31]

Quoted:
What the hell are you talking about? Dave posted that he will make it right with you but you'll went off the deep end and accused him of ridiculous accusations and implications. Where did he say that? You need to settle down, it'll get you farther along in here.

Quoted:
Dave N.

Your accusations and implications are ridiculous,
I have omitted nothing,
I did not manufacture the unit that sliced into
my upper receiver.You reallly appear
defensive about the problem I raised. You
may have a vested interest in CMMG
but that does not warrant insulting another
site member.

+1 You need to settle down and discuss your problem like an adult rather than speak so rashly. In addition, post the pic that you emailed them earlier and maybe someone here will help you.

No one here, aside from user "CMMG" has any vested interest in CMMG. Spec ops and Shadowcop are simply testers for them, not employees. Everyone else is 100% neutral and sees that you're not making much of a case for yourself or providing much evidence. So your "attacks" on CMMG appear baseless.

Posted: 3/3/2011 5:50:17 PM EDT

[#32]

Quoted:

Tag to see a 'sliced' upper.

Yeah I can't wait to see this terrible rub mark....I happen to own a CMMG conversion and have no issues at all with it "slicing" anything.

If OP's pic turns out to be similar to CMMG's posted pic....

Posted: 3/3/2011 5:54:56 PM EDT

[#33]

Well there doesn't seem to be anything on TV so I dug up the tech support email pic.... and here you go...the slice/gouge/rub/whatever.

Posted: 3/3/2011 5:57:05 PM EDT

[#34]

Quoted:
Well there doesn't seem to be anything on TV so I dug up the tech support email pic.... and here you go...the slice/gouge/rub/whatever.

http://a.yfrog.com/img610/9443/fqq7.jpg

Oh crikey - it's a purple upper... that explains the slice.

Posted: 3/3/2011 5:57:08 PM EDT

[#35]

Quoted:
Well there doesn't seem to be anything on TV so I dug up the tech support email pic.... and here you go...the slice/gouge/rub/whatever.

How AR manufacturers cope with the level of idiocy of their customers is beyond me!

Posted: 3/3/2011 6:00:55 PM EDT

[#36]

Quoted:
Well there doesn't seem to be anything on TV so I dug up the tech support email pic.... and here you go...the slice/gouge/rub/whatever.

http://a.yfrog.com/img610/9443/fqq7.jpg

Crappy pic so it's tough to tell if it's a scratch or rub. If it's a scratch it looks like you tried pulling the kit out crooked or the chamber adapter wasn't on the rails all the way, causing it to be really tight and rub/scratch.

Posted: 3/3/2011 6:02:09 PM EDT

[#37]

Quoted:

Quoted:
Well there doesn't seem to be anything on TV so I dug up the tech support email pic.... and here you go...the slice/gouge/rub/whatever.

How AR manufacturers cope with the level of idiocy of their customers is beyond me!

Same way customers cope with idiot companies. Not referring to CMMG.

Posted: 3/3/2011 6:16:27 PM EDT

[#38]

Right. Could not be anything wrong with unit.

Posted: 3/3/2011 6:17:40 PM EDT

[#39]

Right. Just insult the guy.

Posted: 3/3/2011 6:20:56 PM EDT

[#40]

Scratch from the picture looks pretty insignificant.

Posted: 3/3/2011 6:27:04 PM EDT

[#41]

CMMG Industry Partner remarks attached to my photo will give potential buyers a real "feel" for your
Customer Service. They will think you that you watch television in a cave. Good work guy. You are doing
good stuff for CMMG family. Ask someone in marketing. Really.

Posted: 3/3/2011 6:30:01 PM EDT

[#42]

Wanted to ask member with claymore icon. Have you ever set one up?

Posted: 3/3/2011 6:35:13 PM EDT

[#43]

Quoted:
CMMG Industry Partner remarks attached to my photo will give potential buyers a real "feel" for your
Customer Service. They will think you that you watch television in a cave. Good work guy. You are doing
good stuff for CMMG family. Ask someone in marketing. Really.

You're making less sense as the night goes on.

Why don't you help us understand your issue and explain the picture to us since it's now posted but is of rather poor quality?

Posted: 3/3/2011 6:39:56 PM EDT

[#44]

Well, warriors. It has been special.
I wrote and called CMMG, and they did not address my issues.
Everyone can draw their own conclusions.

Posted: 3/3/2011 6:40:15 PM EDT

[#45]

Posted: 3/3/2011 6:40:35 PM EDT

[#46]

OP it is a scratch in the finish of the upper reciever. There will be absolutely no negative affect on anything, other than trying to take a picture inside of a prestine upper reciever!

Posted: 3/3/2011 6:46:52 PM EDT

[#47]

Quoted:
Well, warriors. It has been special.
I wrote and called CMMG, and they did not address my issues.
Everyone can draw their own conclusions.

I have

If you shit all over me on several threads and forums after I said i would
look at the problem if you sent me the parts I would tell you to piss south in a nothbound wind storm too.