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DPMS/CMMG feed jams...HELP!!!

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12 years 10 months ago - 12 years 10 months ago #9775 by Charlie
Replied by Charlie on topic Re: DPMS/CMMG feed jams...HELP!!!
I took a look at the feedramps on my 10s, and they look more contoured compared to yours. It may just be the angle of your photo. Can you shoot one through the ejection port?

I'll post a photo of mine when we get back from the range.

We're back. That didn't take long ;). Here's a couple of cruddy pics of my feed ramps (A4BF)

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It's hard to shoot the ramps. The camera wants to focus on the nearest thing.

Charlie
Last edit: 12 years 10 months ago by Charlie. Reason: Additional info.

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12 years 10 months ago - 12 years 10 months ago #9777 by Charlie
Replied by Charlie on topic Re: DPMS/CMMG feed jams...HELP!!!
If you right click on the pic and "View Image" you'll get the big version.

The first thing I see is that my 10A4BF feed ramps are cut into the upper receiver below the barrel ext, where yours are not. I don't know if that matters, but if all else fails I'd query the barrel maker.

Charlie
Last edit: 12 years 10 months ago by Charlie.

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12 years 10 months ago #9781 by Bob Downey
Replied by Bob Downey on topic Re: DPMS/CMMG feed jams...HELP!!!
I don't have a DPMS/CMMG .308 but, I did have one of each in the 5.56mm
The M4 cuts in the upper make a huge advantage in how well the AR feeds.
If your upper does not have them get them installed by DPMS.

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12 years 10 months ago #9816 by why2dogs
Replied by why2dogs on topic Re: DPMS/CMMG feed jams...HELP!!!
Thanks for posting

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12 years 10 months ago #9817 by why2dogs
Replied by why2dogs on topic Re: DPMS/CMMG feed jams...HELP!!!
Yours seem to be cut way deeper than mine. I also see that, as a result, they blended the ramps down into the upper housing. The rep at DPMS suggested that I send my upper to them and they can work rhe ramps for me. Sounds like the best path forward. Hope it does the trick. I will follow up when the upper comes back. Thank you!!!

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12 years 10 months ago #9826 by why2dogs
Replied by why2dogs on topic Re: DPMS/CMMG feed jams...HELP!!!
Mark at DPMS says it's going to be a 3 to 4 week turnaround. So, this thread is gonna go cold, but I will follow up. Hopefully with good news. I'll try to post a couple of pictures like the ones Charlie took for comparrison. I can't believe I'm the only looser with this problem! Thank you all for your input, Dave.

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12 years 10 months ago #9831 by Bob Downey
Replied by Bob Downey on topic Re: DPMS/CMMG feed jams...HELP!!!
You are not the only person that has experienced this problem.
Take yourself out of the "loosser" catagory.
When this rifle comes back you will love it.
I wouldn't doubt you will give it a name and put it in your will. :laugh:

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12 years 10 months ago #9833 by Akai
Replied by Akai on topic Re: DPMS/CMMG feed jams...HELP!!!
Yep, Heard that I gave the AK-47 (stepchid's) names :laugh: but their not in the will yet! Bob :blush:

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12 years 10 months ago #9842 by BUILDING MY SASS
Replied by BUILDING MY SASS on topic Re: DPMS/CMMG feed jams...HELP!!!
Show how much I have been keeping up on things....Didn't even know CMMG make a .308 :laugh:
First off...I would be on the phone to both companies....asking about compatibility....some guns may not work with others....from what I can see, the CMMG lower looks to be lower...than the DPMS....but not sure...if this is the case...then you would have jams constantly... but again....I would contact the companies....
I have heard of DPMS having some QC issues lately....so ...you may want to send it in for inspection....
I have a question....not meaning any offense...."why" would go with this combo....
again...just curious...
BMS

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12 years 10 months ago #9844 by why2dogs
Replied by why2dogs on topic Re: DPMS/CMMG feed jams...HELP!!!
Very inspiring, Bob. I was only able to shoot one round, but it rocked !Can't wait to get it back. It's packaged up and being dropped off at the UPS store today. DPMS is WAY backed up, so it's gonna be a while. Good things come to those who wait.... or so I'm told.

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