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Sig m400p in .300 blackout, odd issue after only a few rounds..

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posted on Feb, 22 2015 @ 01:22 PM
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originally posted by: Skid Mark
My friend got back to me. This is what he said:

"It looks like to me bad metal and poor machining on behalf of the manufacture. Needs to be took back to dealer or sent back to Sig"

I hope that helps.


That's my bet.




posted on Feb, 22 2015 @ 02:09 PM
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Don't mess with it in any way -- it is a factory defect or the result of the local shop's "customizing." Send the photos directly to SIG with a description so they know what they are looking at and ask them how to proceed. The local shop's only function will be as an FFL that can ship and receive the rifle. If they seem nervous about it, look for a guilty gunsmith.



posted on Feb, 22 2015 @ 02:32 PM
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originally posted by: SubTruth

Makers you can trust.......KAC....Larue.....Noveske.....Glock....S&W MP........Ruger......Remington......BCM.


I think Noveske is the only one to match my Daniel Defense 300



posted on Feb, 22 2015 @ 03:48 PM
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a reply to: Skid Mark
No doubt, but still something has to be causing the chips... striking it



posted on Feb, 24 2015 @ 04:19 PM
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So sig got back to me, said its not an issues. It's a break in thing.

"My gunsmiths were able to take a look at the photos. The wear you are seeing is normal. The carrier cam pin hits that spot when it unlocks the bolt. It’s a metal part hitting aluminum it will wear down. Nothing to worry about."

This seem right? It looks like he's gonna take it to a gunsmith just to make sure.



posted on Feb, 24 2015 @ 04:25 PM
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a reply to: mindseye1609

Is this a piston gun? Are you using cheap steel cased ammo?
edit on 24-2-2015 by SubTruth because: (no reason given)

edit on 24-2-2015 by SubTruth because: (no reason given)



posted on Feb, 24 2015 @ 05:55 PM
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a reply to: SubTruth

The m400 has a gas system I'm pretty sure, and Remington ammo.



posted on Feb, 24 2015 @ 07:11 PM
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originally posted by: SubTruth
a reply to: mindseye1609

Is this a piston gun? Are you using cheap steel cased ammo?

not in .300 BLK--that's a relatively new round that either requires new brass or cutting down old brass from .223 and re-sizing. Can't imagine trying to cut down some steel cases, and steel cases just can't be readily reloaded.
edit on 10/06/2013 by Tusks because: (no reason given)

edit on 10/06/2013 by Tusks because: (no reason given)

edit on 10/06/2013 by Tusks because: (no reason given)



posted on Feb, 24 2015 @ 07:35 PM
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originally posted by: Tusks

originally posted by: SubTruth
a reply to: mindseye1609

Is this a piston gun? Are you using cheap steel cased ammo?

not in .300 BLK--that's a relatively new round that either requires new brass or cutting down old brass from .223 and re-sizing. Can't imagine trying to cut down some steel cases, and steel cases just can't be readily reloaded.




Good info to know.....Thanks. I am pretty sure steel can not be reloaded. From the pics the OP posted this looks far worse than normal wear and tear. My ar15s look nothing like that inside the chamber. Light marks that is all.



posted on Feb, 24 2015 @ 07:35 PM
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originally posted by: mindseye1609
a reply to: SubTruth

The m400 has a gas system I'm pretty sure, and Remington ammo.





You should post your pics on ar15.com these guys will know whats up.



posted on Feb, 25 2015 @ 11:17 AM
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originally posted by: mindseye1609
So sig got back to me, said its not an issues. It's a break in thing.

"My gunsmiths were able to take a look at the photos. The wear you are seeing is normal. The carrier cam pin hits that spot when it unlocks the bolt. It’s a metal part hitting aluminum it will wear down. Nothing to worry about."

This seem right? It looks like he's gonna take it to a gunsmith just to make sure.


That sounds like a load of # to me if I'm honest. I'd get a second opinion elsewhere.

edit on 56111642 by sg1642 because: (no reason given)



posted on Feb, 26 2015 @ 10:52 AM
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a reply to: sg1642

Ya we've corresponded more and he reassured me that it's normal so my buddy is going to get someons else to put eyes on it.

My next 2 guns I'm going to purchase are sig so it definitely let a little air out of my balloon but we will see, no judgments yet.



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