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Hello. I was at the range this past weekend and I encountered something very bizzare. Gun worked fine but midway through a fully loaded 30rd mag I pulled the trigger and "click".

Pulled the mag out, there's rounds in it, nothing in the chamber and the gun is locked up in battery. Has anyone seen this where the bolt fails to pick up a new round? Only had it happen once.
 

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Are you using the stock Sig mag that came with your rifle?
If so, throw it in the garbage and pick up some Pmags. The mags Sig ships with their rifles are pure garbage.
 

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+2. Apparantly this is a well-known problem.
 

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DON'T THROW AWAY YOUR SIG MAG!!! simply put it down range and blow it to hell!!!
 

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siggy said:
Hello. I was at the range this past weekend and I encountered something very bizzare. Gun worked fine but midway through a fully loaded 30rd mag I pulled the trigger and "click".

Pulled the mag out, there's rounds in it, nothing in the chamber and the gun is locked up in battery. Has anyone seen this where the bolt fails to pick up a new round? Only had it happen once.
That is called "Failure To Feed" or FTF for short.

Usually, it is the fault of the magazine. Either it isn't seated properly, the follower tileted, or the spring isn't strong enough to present the next round in time for the bolt carrier to push it into the chamber.

The polymer SIG mags are pretty weak.

You might want to look into pmags from magpul industries. They can be found online at various retailers in the $14 - $17 range.

Magpul's site - http://store.magpul.com/prod_detail_list/2

look around at the various online sites and you can find these for less $.
 

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restoring said:
You might want to look into pmags from magpul industries. They can be found online at various retailers in the $14 - $17 range.

Magpul's site - http://store.magpul.com/prod_detail_list/2

look around at the various online sites and you can find these for less $.
+1!
Whether or not your Sig mags are bad, Pmags are great!
 

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Sounds like its time to chuck the Sig mag down range and blow it apart. Thats about all they are good for.
 

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I wish I had known this before I bought an extra pair of Sig mags. On my first range trip, one of my mags had this exact problem. I marked it. I'll keep cycling them to see if I can recreate it. If it happens again, that mag goes down range for target practice.
 

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Had the same thing happen during my last outing. I think it was a colt mag. Only had a few rounds in there, like two or three, and after a quick tap got right back to shooting. Figured it was a weak spring.
 

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Scott, that's why it's good to read before buying or changing anything. Chances are, someone here has done it or seen it. The Mag issue was known from the jump, when I started here 1.5yrs ago. Sorry you didn't know that :cry:
 

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yep, sucks for me. It was one thing I didn't think to research. You'd think Sig would offer their rifles with magazines that actually weren't defective.
 

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Scott_F said:
yep, sucks for me. It was one thing I didn't think to research. You'd think Sig would offer their rifles with magazines that actually weren't defective.
They aren't really defective. They just suck. :wink:
 

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Some folks here have had better luck with them after modifying them. They filed away the part of the mag causing the problem. You may want to look into that :)
 

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...i wouldn't rely on the Sig mags...just take a pencil and push down on the front end of the follower...it tilts excessively...not good...coupled with spring that is too weak in my opinion...this can cause a varity of malfunctions...including the stack of cartrages to hang up...especially when using cartrages with longer projectiles...

...the Sig mag is a good conversation piece though... :p
 

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It happens to me all the time with every 20 round mag I've tried. So far PMags were the most troublesome but the feed the easiest. I think the bolt catches the round by 1/64" and then slips off. The round moves just enough so that the case gets smashed between the magazine and the bolt carrier. I've tried GI Colt mags and now have a new brownell mag that have never smashed the case but very often won't pick up the round. All the above happens when I load 5 or 10 in the 20 rounder. If I load all twenty it will work fine for the first 8 or 10 then the FTSs begin. I think its about time to send the rifle back to Sig. All the magazines can't be bad, can they?
 

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Are you sure the magazine is not being interferred with by either hitting on a bench rest or by you gripping it while shooting? Some people hold the mag when shooting. If these are not the issue then I would have the rifle checked out.
 

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I use the HK 416 20 rd mags. Spendy? Yep, but never a problem. Have used them in my SIG 556 as well as my M4. Something you might want to consider before sending the gun off to SIG. Big fan of the 30 rd PMAG and HK 30 rd Navy mags.
- Chad
 

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...sticks.bcs

...you shouldn't be having so many malfunctions with so many different magazines...especially the USGI 20 rounders and Magpuls...in fact...you shouldn't have any malfunctions with the 20 round USGI mags at all...i use them all the time...i'm afraid it's time to send your rifle back to SIG...even if you find a mag that works...
 
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