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11/28/2012 10:21:19 AM EDT
Picked up a Sig 716 the other day and mounted an AAC SDN6 on it. The gun functions perfectly unless I shut the gas off and then there’s no opening the bolt unless I separate the upper from the lower and pry the carrier with a screwdriver. Once the fired round is removed, it slides easily in and out of the chamber. Ammo is South African ball if that might be an issue.

Should I just be happy and never shut the gas off? Is this a break in thing? An ammo issue?
11/28/2012 11:41:58 AM EDT
[#1]
It can be a combination of both breaking in and ammo.  My Sig 716 was very tight with the upper/ lower and the bolt/ carrier.  I had to clean the heavy amounts of factory oil out and things moved smoother.  7.62 nato ammuntion runs at a lower pressure than 308 and South africian ammunition gave me your identical issues on a FAL I had. I've been shooting 308 in my 716 to allow the parts to wear in for 100 round or so before trying the surplus. If it doesn't work after that and you could afford it shoot another 50-100 rounds of 308.  I had this problem in a 5.45 AA rifle I built too.  The rifle would not cycle comercial Wolf but, run perfectly on surplus.  After getting 4-500 rounds of surplus in the rifle it functioned without a hitch on Wolf. Also, don't just blow through the 308 rounds without inspecting the brass you just shot for unusual signs. (blown primers, bulges, deep gouges, and etc.)  If the problem persist give Sig a call or just call them to see if they recomend the same method.
11/30/2012 12:20:27 AM EDT
[#2]
When you turn the gas off  then fire a shoot you can't open the bolt , right..   the casing expans so what and get's seated in the chamber . I had same luck when I got my 716 . I thought the same thing. I then shut the gas off on the DPMS  same thing tight bolt.

just don't turn the gas off and you won't that problem..


if you go to you tube there is a guy there from Jacksonville who claims that all the Sig 716 are bad  for the same reason.. he is turning the gas off and causing it not to cycle the bolt and claiming it is the rifle fault..
11/30/2012 1:41:54 AM EDT
[#3]
One thing I don't understand, why shoot really cheap/crappy/boderline unsafe surplus ammo through a expensive/really nice rifle
the SIG 716 ... and then when problems surface via surplus ammo, everyone is surprised ? Not to mention possibly voiding your
rifles warranty...

Please don't shoot suspect ammo through your precision made weapons, please.
11/30/2012 2:09:29 AM EDT
[#4]
Quoted:
One thing I don't understand, why shoot really cheap/crappy/boderline unsafe surplus ammo through a expensive/really nice rifle
the SIG 716 ... and then when problems surface via surplus ammo, everyone is surprised ? Not to mention possibly voiding your
rifles warranty...

Please don't shoot suspect ammo through your precision made weapons, please.


Dear God, please stop...
11/30/2012 4:26:43 AM EDT
[#5]
OK, I’ll give it some break in time or just stop doing that.

Now I seem to have another problem, what to do with more than 12,000 rounds of suspect/cheap/crappy/borderline unsafe surplus ammo.  I’ll have to put a little in the trash over a period of time, I’m sure if I put it all out to the curb at once no one would take it.

11/30/2012 6:51:16 AM EDT
[#6]
break the rifle in clean and shoot the surplus its good ammo for blasting/plinking. Ive had no problems running it through my ptr91 or fr8.

Its not match ammo but shoots good, also take cleaning precautions all the SA ive used has been dirtier than commercial.

11/30/2012 12:43:58 PM EDT
[#7]
Quoted:
OK, I’ll give it some break in time or just stop doing that.

Now I seem to have another problem, what to do with more than 12,000 rounds of suspect/cheap/crappy/borderline unsafe surplus ammo.  I’ll have to put a little in the trash over a period of time, I’m sure if I put it all out to the curb at once no one would take it.



I know this is asking a lot of me, I'll try to take all that suspect/cheap/crappy/borderline unsafe surplus ammo off your hands. I have a crappy POF and a GAP10 on order that I'll try to make work. I know it's a huge sacrifice on my part but your a fellow arfcommer so I'll try to help.

11/30/2012 2:52:47 PM EDT
[#8]
Quoted:
OK, I’ll give it some break in time or just stop doing that.

Now I seem to have another problem, what to do with more than 12,000 rounds of suspect/cheap/crappy/borderline unsafe surplus ammo.  I’ll have to put a little in the trash over a period of time, I’m sure if I put it all out to the curb at once no one would take it.





Sorry, I didn't mean any harm...Just hurts to see such a nice rifle get fed suspect surplus ammo...but, since you have so much on hand
I can see your quandary...Anyway, keep it well oiled and clean it often...Good Luck with It.

12/4/2012 12:29:33 AM EDT
[#9]
I called Sig and ask what type of ammo to run through it
I was told ANYTHING with a brass case

and keep it wet and clean
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