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Discussion Starter · #1 ·
I just got my 556 DMR tonight. Opened up the box and case and looked it over. The upper and lower seem quite loose (audible rattle when handling the rifle). Is this normal?
 

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My first post here on this forum, so I'm probably not best to answer, but my 556 that I just bought a week ago Sunday (first day of rebate) was not loose at all. My upper rail doesn't even seem to be removable without unscrewing something (not sure how it comes off yet). So, I'd say something needs to be tightened down. The lower rail is removable. The manual tells you how to do so. It reads a lot more complicated than it is. The only thing that wasn't obvious when taking mine apart the first time was removing the lower rail. You have to match up the notches in the rail for it to slide down and off. Hope that helps some.

Jim
 

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Discussion Starter · #3 ·
thanks for the reply. let me clarify....I'm not talking about the rails on the front grip but the upper and lower half of the rifle itself.
 

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Discussion Starter · #4 ·
Here's the approximate area of where the two parts of my rifle make noise

 

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PGT said:
The upper and lower seem quite loose (audible rattle when handling the rifle). Is this normal?

...a little play between the upper and lower is acceptable and perfectly normal...however...it should not "rattle" when handling the rifle...for example...when you hold the gas block/barrel and lower...and twist the rifle...there will probably be some "small" degree of movement between the upper and lower reciever...likewise...when grasping the top rail and lower...and pulling up and down...there may be a small amount of movement between the upper and lower...and so forth...however...the movement should not be so great so that you can easily hear it or have some sort of rattle...

...IMO...you need to call customer service and have them send you a return shipping lable so that you can return your DMR for adjustment...they will most likely replace the lower reciever with one that fits more snugly...

...here's some additional information

... http://www.sigarms556.com/viewtopic.php?t=2761
 

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Discussion Starter · #6 ·
great link ullie, thanks. I quite literally unboxed my rifle, snipped the zip-tie, opened the case, picked up the rifle with one hand on the stock and the other on the forend. it made noise. :cry: I held up the rifle with one hand vertically by the stock and wiggled it....it makes noise and it feels like the rifle is not 'one'.

I've shot a Carbon-15, a .458 SOCOM, my 308 Saiga, a Saiga-12 recently....none had sloppy tolerances like that.
 

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Discussion Starter · #8 ·
thanks...I was just looking at those earlier today on Cheaper than dirt. Happen to have a pic of how it was trimmed?
 

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PGT said:
I quite literally unboxed my rifle, snipped the zip-tie, opened the case, picked up the rifle with one hand on the stock and the other on the forend. it made noise. :cry: I held up the rifle with one hand vertically by the stock and wiggled it....it makes noise and it feels like the rifle is not 'one'.
...honestly PGT...your DMR needs to go back for adjustment...that amount of play is unacceptable...and "may" lead to issues down the road...
 

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Discussion Starter · #10 ·
agree 100%. I have the shipping label to send it back....Sig has been great so far.

I would have dropped it off today but figure Sunday to the range and Monday back to Sig can't hurt, right???? :wink: A shame to wait to get it and then not even put a round through it before going back.

On another front, any idea how I can add a grip rest like on the 550 Sniper?

 

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Discussion Starter · #12 ·
oooh....nice. $250. Ouch

 

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...PGT

...i would call Mike at Colorado Gun Sales and see if he can order you one of the Swiss factory grips...i see no reason why they will not mount on your DMR..although i have never changed one out personally...so i'm guessing...he should be able to give you a definative answer though...if i remember correctly...the grip interface on the sniper is the same as a 550/551...
 

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MPK61 said:
My DMR upper to lower fit is fairly tight. However, my son's SCM upper to lower fit rattles as you described. We modified an AR 15 rubber wedge and placed it in the lower right were the upper lug would hit. After some extensive trimming of the wedge, the upper and lower fit were nice and tight.

http://www.brownells.com/.aspx/pid=1666 ... ACCU_WEDGE
Let me start off by saying if this "solution" worked for you than more power to you, but it really shouldn't be necessary

Interesting that they would actually make something like this. I actually think it's a solution in search of a problem though. This wedge is addressing an issue that shouldn't exist in the first place. I mean, I could POSSIBLY understand something like this being used to try and extend the life of a well worn rifle, but not something that should be necessary on an out of the box or even moderately used rifle.

- Dtech
 

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Discussion Starter · #15 ·
ullie said:
...PGT

...i would call Mike at Colorado Gun Sales and see if he can order you one of the Swiss factory grips...i see no reason why they will not mount on your DMR..although i have never changed one out personally...so i'm guessing...he should be able to give you a definative answer though...if i remember correctly...the grip interface on the sniper is the same as a 550/551...
emailed but no reply.

Cogunsales sells replacement pistol grips from a 550/551 and says they fit all models including the 556. The German site above with the model I want says specifically the contours of the rifles changed and their product won't fit the 556.

So....I'm now confused. Is the DMR different? From the pics, they all look the same.
 

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Discussion Starter · #16 ·
still no reply from cogunsales - worthless.

bit the bullet and ordered the nills wooden grip from Germany
 

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Discussion Starter · #17 ·
arrived yesterday. nice piece of kit. I'll fit it this weekend and snap a pic
 

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Nice. Hope it fits, I'll be adding one to my wishlist if so.
 

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Discussion Starter · #19 ·
it fits great with a few minor tweaks to clear the front of the trigger guard.


 
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