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DD5v2 issues

Z

Zombie sniper

Private
Minuteman
Oct 16, 2019
18
2
#1
New to the forum and hoping for some guidance.
I recently purchased a Daniel Defense DD5v2. Was very excited to head to the range to sight in. After my local GS gave it one over off I went with federal GMM. Nothing but problems, missfeeds, and bolt would not stay open on last round either running through the supplied Magpul mags or single load. Back to my GS and sent back to DD.
After a few weeks got it back, they changed the bolt carrier, polished the feed ramp and changed the buffer spring. They also said I needed a spacer on the stock as we had had to change to be NJ compliant, went with magpul v3 adjustable stock.
Off I went to the range again. Same issues. Very upset. Called DD and explained I planned to use the rifle for NRA high power.
And am using federal GMM. They said the issue might be the Ammo so my GS and I took whatever Ammo off his shelves and tried again. No luck with about 5 different loads.
Back to DD again, this time when it came back the worksheet just said warranty work.
Ok, let’s head out and try again
Single feed only a few times the bolt didn’t stay back missfeeds from the mag.
im at a loss not sure what to do now.
send it back for the 4th time or dump it and move on. Any help will be appreciated. I’m very frustrated
 
#2
I am not familiar with the "User-adjustable gas block" DD makes .. what is it set at ?

Most Adj. GB's have a useful range of settings... is the DD Adj. GB a simple " suppressed / non suppressed" setup ?

What buffer weight are you using ?
 
#4
Are you using a supplied mag from DD or something else?

I would send back again, if you dump it you’ll have either a pissed off buyer or take a significant loss if your honest about it

Sounds like your undergassed

what exactly did they have to modify or add to make it compliant for your state. I’d start looking in that area for issues
 
#5
Agree with the undergas diagnosis, esp if the bolt carrier group is not traveling far enough to engage the catch on the last round. I would try to find out if D.D. checked for an undersized gas port. Or a restriction in that area or in the tube somewhere.

One other possible way to confirm/deny an undergas condition would be to stick a can on it and see how it cycles. D.D. rifles are typically overgassed.

Edit: when inspecting the upper, lower forgings, trigger group, bcg, bore and chamber is anything unusual observed, such as scoring, chips, cracks or any other signs of damage or unusual wear patterns?
 
Last edited:
#6
In changing the stock, did you change any buffer components? Spring, buffer, receiver extension.....

Make sure that the bcg is going back into the RE enough. Will the bolt catch on an empty mag hand cycling the rifle?
 
#9
nn8734 said:
Agree with the undergas diagnosis, esp if the bolt carrier group is not traveling far enough to engage the catch on the last round. I would try to find out if D.D. checked for an undersized gas port. Or a restriction in that area or in the tube somewhere.

One other possible way to confirm/deny an undergas condition would be to stick a can on it and see how it cycles. D.D. rifles are typically overgassed.

Edit: when inspecting the upper, lower forgings, trigger group, bcg, bore and chamber is anything unusual observed, such as scoring, chips, cracks or any other signs of damage or unusual wear patterns?
Click to expand...
Nothing unusual my GS went through it twice
 
#10
Jsp556 said:
In changing the stock, did you change any buffer components? Spring, buffer, receiver extension.....

Make sure that the bcg is going back into the RE enough. Will the bolt catch on an empty mag hand cycling the rifle?
Click to expand...
Factory changed the buffer spring first time back
Bolt will catch on and off not consistent
 
#13
Zombie sniper said:
Bolt will catch on and off not consistent
Click to expand...

Assuming you’re stating that the bolt catch is not engaging consistently when manually cycling, sound like at least part of the problem has been identified. Please correct me if I misinterpreted the above in quotes.

Does it consistently engage the bolt carrier group when simply pulling the charging handle back far enough then manually engaging the bolt catch when no mag magazine in the mag well?
 
#16
nn8734 said:
Agree with the undergas diagnosis, esp if the bolt carrier group is not traveling far enough to engage the catch on the last round. I would try to find out if D.D. checked for an undersized gas port. Or a restriction in that area or in the tube somewhere.

One other possible way to confirm/deny an undergas condition would be to stick a can on it and see how it cycles. D.D. rifles are typically overgassed.

Edit: when inspecting the upper, lower forgings, trigger group, bcg, bore and chamber is anything unusual observed, such as scoring, chips, cracks or any other signs of damage or unusual wear patterns?
Click to expand...
Nothing unusual, I would hope that was the first thing they checked. My GS checked the port based on the specs from DD
 
#21
You're either under Gassed or your buffer system is too heavy. Either way this is bullshit and DD should have fixed this the first time. Also what ammo is DD using during their testing?
 
#22
That’s what my GS said, seems like the buffer system. According to DD it isn’t.
When I spoke to them they said FGMM is crap and they use cheap surplus ball Ammo. We tried Hornady 168 match, fiochi 155, Pmc and all have the same issue. I went so far as to call federal and they were not pleased with DD response.
I also thought DD would have tested before sending back the first time. So when it came back the second time I asked my GS if he had test fired first and said he was waiting for me. They thought it was unlikely to come back with same issue but unfortunately it did.
GS called and spoke with DD and they asked him what he would do to fix it, unbelievable.
I thought I did my homework before purchase as I couldn’t find any negatives and they just were awarded a military contract.
I guess I may be the lucky one in million.
It’s a shame as the rounds I was able to get down did under 1/2 ‘“ at 200yds.
 
#24
GS changed the stock, DD changed the tube and spring first go around. DD said the stock needed a spacer which was ordered from magpull and installed by GS. It was in this configuration when it went back to DD second time.
 
#26
OP, at this point I would ask DD for a replacement rifle. Something is clearly wrong with yours and it doesn’t sound like it’s going to get fixed anytime soon.

Not sure how experienced or not your gunsmith is with the AR platform but between him and DD it should have been resolved by now.

FWIW, I own and have owned numerous small and large frame AR pattern platforms (including two DD ARs) and fired FGMM through all of them. Never had an issue.
 
#27
You can easily rule in or out the buffer and spring being the issue by simply bringing a few different buffer/spring combos to your range.

Shoot a few rounds with each and note how it performs.

If it doesn’t cycle properly with any of them, problem is likely elsewhere.

Sorry to hear you are having these problems. I know it’s extremely frustrating to deal with.
 
#28
nn8734 said:
You can easily rule in or out the buffer and spring being the issue by simply bringing a few different buffer/spring combos to your range.

Shoot a few rounds with each and note how it performs.

If it doesn’t cycle properly with any of them, problem is likely elsewhere.

Sorry to hear you are having these problems. I know it’s extremely frustrating to deal with.
Click to expand...
Thank you for the advise, will give it a try
 
#29
nn8734 said:
OP, at this point I would ask DD for a replacement rifle. Something is clearly wrong with yours and it doesn’t sound like it’s going to get fixed anytime soon.

Not sure how experienced or not your gunsmith is with the AR platform but between him and DD it should have been resolved by now.

FWIW, I own and have owned numerous small and large frame AR pattern platforms (including two DD ARs) and fired FGMM through all of them. Never had an issue.
Click to expand...
He’s been around for a while, I’m 53 and he was friends with my dad from back in the day.
ill shoot for a replacement and let you know what DD says.
they’ve been less and less
“Polite “ as the contact grows.
 
#30
Yea, please keep us posted...That’s a shame as DD does make really good stuff for the most part. I have two (a Blk II & Mk18 Mod1) and they both function flawlessly, hence my interest in this issue.

Unfortunately, Seems like you got a straight up lemon but hopefully further testing identifies the causes and they can be easily fixed.

If not, they need to send you a replacement.
 
Last edited:
#31
I have a few suggestions, but after typing them out I decided this was the wrong advice in this situation. Assuming this was a new rifle, it's foolish to mess with anything or spend a dime of your own money on parts trying to fix it. This is on the manufacturer, DD in this case. Especially on such an expensive rifle. My advice is ask for a refund or replacement. Don't spend a dime or anymore of your time messing with it.
 
#32
Wanted to update everyone and many thanks for the help and advise.
DD wasn’t anxious to take the rifle back for a fourth time. My GS decided to take on the project and started trimming the buffer spring. He called to let me know he thought he had it functioning properly so I went to test fire and worked much better but not 100% still had missfeeds. I had seen another thread with someone having similar issues and recommended Lancer magazines.
Received the pricey magazines ran 100 rounds through single feed and 5 at a time through the new mags.
Amazing, not one missfeed or failure to hold open.
Definitely would not recommend DD I don’t think they handled the issues professionally at all. I would however recommend Lancer magazines. Double the cost of the supplied magpul but definitely worth the money.
Again thanks everyone for the abundance of help.
 
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