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SIG 516 Major Issues

This is a discussion on SIG 516 Major Issues within the SIG Sauer Rifles forums, part of the SIG Sauer Forum category; Come on people you bought a mill spec rifle with the 556 NATO chamber why don't you try to shoot mill spec ammo designed to ...


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Old 12-25-2012, 04:05 PM   #46
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Come on people you bought a mill spec rifle with the 556 NATO chamber why don't you try to shoot mill spec ammo designed to cycle a milspec 556 action I have over 3000 rounds through mine with only one failure to feed because I didn't seat the magazine properly.. Operator error will contribute to 99.5% of your problems.. Semper fi! A mill spec one and seven twist 16" barrel is Best served with M855 ball (steel core green tip) ammo or MK 318.. Has never failed me!

Last edited by martin; 12-25-2012 at 04:37 PM. Reason: Finished too soon
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Old 12-25-2012, 04:10 PM   #47
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If you want to shoot cheap .223 ammo buy a rifle made for it. there's a 8400+ PSI difference in .223 - 5.56mm.. Changing the spring does not make ammunition safe for different rifles the angle of lade between the chamber and rifling is what is different, saami.. they do have information available for those who would like to know what they're shooting.Proper fire arms training and knowledge is priceless.. props to sig for jumping on the ar wagon..sick rifle.. And I love my 716pm.. It shoots 7.62x51.. I won't be shooting any .308 Winchester through it as that's almost 2500 psi stronger.. My wife likes my face the way it is.. Even though modern manufacturing tolerances allow it I was taught better than that..

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Old 12-26-2012, 07:30 AM   #48
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Look. All you people that want to reply with the same old, "It's the ammo, loser, you bought a mil-spec weapon....blah blah blah.....user error" cookie-cutter response, you are no better than SIG. For the last time, I am shooting 55 grain 5.56 rounds. The pressure should be fine. SIG is telling me to shoot 62 grain, which should be uneccessary. Besides, this gun is far from mil-spec, the worst part about this whole situation is that this is looking like it will be my first and last AR for quite some time, and I wouldn't trust it to save my life.
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Old 12-26-2012, 07:43 AM   #49
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I feel for you man. I bought a M400 and a 516 this summer and they will both function with what ever ammo I put in them. I'd send it back to Sig.

Doug
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Old 12-26-2012, 07:14 PM   #50
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Hello all, I'm new to this forum but need some input on my new 516 FDE. This rifle has been malfunctioning right off the start. I read a lot of posts but none of them seem to fit my problem. It's not a gas issue, mine is chewing up the brass. It's a fail to feed problem only. I use nato FMJ 5.56 ammo and the BCG will not go fully into battery or even far enough most of the time to use the forward assist. I can start with the BCG locked back, insert the mag, release from the bolt catch and it won't go into battery, the BCG will stop after stripping the live round out of the mag and moving forward, but when it stops, you can still see the lugs on the bolt.

Out of a 30 rnd mag, it will malfunction 10-12 times. When I open it up, there are small pieces of brass all over the place, even down in the trigger group area. Is the problem in the feed ramps???? I've never had any type of AR do this before. I expect to see some brass coloring after a few hundred but not shavings. Any help would be appreciated.
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Old 12-26-2012, 07:26 PM   #51
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Look at the feed ramp. I believe people have sent them back and Sig would polish this area and fix the problem. Just an idea.
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Old 12-27-2012, 01:18 AM   #52
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Quote:
Originally Posted by Zombie Spice View Post
Look. All you people that want to reply with the same old, "It's the ammo, loser, you bought a mil-spec weapon....blah blah blah.....user error" cookie-cutter response, you are no better than SIG. For the last time, I am shooting 55 grain 5.56 rounds. The pressure should be fine. SIG is telling me to shoot 62 grain, which should be uneccessary. Besides, this gun is far from mil-spec, the worst part about this whole situation is that this is looking like it will be my first and last AR for quite some time, and I wouldn't trust it to save my life.
How many rounds have you shot?
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Old 12-27-2012, 11:51 AM   #53
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I know what you mean about not trusting a weapon. I went through the break in period, multiple cleanings, FTF, bolt not locking to the rear, calling SIG, etc. with a Sig 716. Simply shot it more and cleaned it more until it started working, and ended up putting 300 rounds through it with no issues. It was still picky on the ammo but, when fed right, it shot like a champ. However... I just didn't warm up to it. Call it the teething troubles, heavy trigger, or just plain fussiness (perhaps in me, not the rifle , but I ended up selling it. Now, I shoot an M1A Scout that is simply a dream. To each his own. I hope Sig makes it right for you.
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Old 12-27-2012, 02:36 PM   #54
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I called SIG today, they sent me an RMA so it will go back tomorrow. I hope your right Coanan, that the ramps just need polishing. When I get it back, I'll do an update.
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Old 12-31-2012, 02:41 PM   #55
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Same here for me. I was using 55gr remanufactured Ultramax ammo. I have had no problems. Cycles like a charm! Bolt looks like I haven't even fired the gun. Super impressed how clean it stays after putting so many rounds thru it.
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Old 12-31-2012, 10:09 PM   #56
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I had the same issue. The first 60 rounds that were lawman 5.56 55 gram fired without any issues. The I switched to American Eagle 223 55 gram thats when the problems occured on almost every shot. I have called sig and they told me to run in adverse conditions if I was shooting anything 55 grain or less. Anything over should be ran in standard mode. Below is info from sig that documents this problem. I'm glad I found this because I was very concerned due to the manual stating not to run the gun in adverse mode for long periods of time. This cleared up my concerns.
16" SIG516
I still feel that after I fire a few thousand rounds through the gun if I shoot 223 it will need to be in adverse and if I shoot 5.56 it will be fine in normal. The 5.56 round has more pressure and my personal feeling is sig isnt going to go back and forth with every end user so they sum it up with the article above. I bet their large customers have a full work up on the issue. I wish they would use different descriptions for the settings like normal and reduced, etc... adverse just doesnt sound good like something is broke or wrong.
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Old 01-02-2013, 08:33 AM   #57
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My Z06 runs on 87 too.. Just like shit.. lol.. Nato brass is thicker.. Ie: less expantion .. Fewer fte problems.. Especially when hot. One reason Why the usmc favors mk318.you Army guys mk262. M-855 (if ther in armor or behind a car/truck door) bla bla bla.. .and are tought bang bang stop.. Bang bang bang stop.. Heat dissapation..we will see how the new m-27 hk holds up in service for that.. In no way is mill spec "hi quality".. Mass production, cost, with a few hardend parts.. Proper inspection and maint. Is all operator responsabity..feed ramps, mags, brass,barrel nuts,ect.. in 40 somethin years the main change in millatary arms is (tweaking)ammo! Find the flavor your rifle likes.. And use it.. fyi.. som 0000 steel wool and a finger or pencil eracer can work magic on crappy quality controll.. Personally i got the sig 50% cost and 50% ther piston system has been in use for like over 30 yrs. oh and Ive seen what can happen to "mill spec m-4/16a2 under constant fire in the "heat of the moment" never saw any zombies though..maby soon..lol ..maby then we will get some .223 ammo issued ..
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Old 01-03-2013, 10:53 PM   #58
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If you would like documentation from sig that shows its ok to switch the gun to adverse conditions for certain ammo go to their site and read about just the 516 upper. It reviews this setting and when it should be used. I was concerend cause in the manual it stated not to run in this mode for long periods. However, it looks like they are now saying its ok and will correct the FTF problem.
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Old 01-06-2013, 01:02 PM   #59
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Subscribed, Just picked up a Gen 1 (I believe, Manufactured in 07/11) 516. Shot PMC 55 grain .223 today and had no issues.
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Old 01-13-2013, 11:02 AM   #60
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516 issues

I have a 516 fde that is about 1 month old, I have put about 1000 rds through it at the range with different ammos. What I have found is that as far as 55gr. stuff goes, both the federal and American eagle 55gr 223 works fine with no issues at all. Any of the steel case stuff like wpa, wolf, tula seems to be underpowered and has difficulty cycling the bolt and also has many FTE, FTF issues. I have not been able to get any PMC so I'm not sure about that. What works best is the 62gr 5.56 green tip or 62gr 5.56 brass federal. My 516 seems to like the ammo from federal, lake city, and American eagle, which is federal. Seems like their loads on their ammo is more powerful or very consistent at least. All of this was on the normal setting also. I did try to use the adverse setting with the steel case stuff and still had the same issues.
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