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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; I thought I would revisit this thread because people are asking way too many questions about ammo. 1) Every time I've called Sig CS on ...


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Old 02-26-2013, 08:17 AM   #81
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I thought I would revisit this thread because people are asking way too many questions about ammo.

1) Every time I've called Sig CS on something they have been dumber than a box of hammers.

Ex: I'd like to install a longer barrel. Do you have a longer piston available for 20" barrels? Answer. 20" barrels gas port is in the same place as 16" barrels.

I point the SC thing out simply to show that they don't really know what they are talking about.

2) A new Sig may not eject .223 on a normal gas setting. Stop and think about it: bad guys are shooting at you and your ammo isn't ejecting. What to do, what to do? Call a time out? No! You change the gas setting on your carbine's gas block to adverse as it was designed to do and carry on.

3) I've noticed no adverse damage from using the adverse setting. The carbine has a slightly harder recoil and that is it. Internal bits look fine after extended use. Just fine. I'm pretty certain that no damage would happen if you left the gas block setting on adverse for the duration.

4) As noted elsewhere in this thread, 5.56 ammo is higher pressure ammo than .223 and Sig machines the 516 chamber tight. Like new new engines, the chamber wears in a bit before everything is copastetic. 5.56 ammo wears in faster and works better (i.e., quicker) at breaking in your new carbine than .223. But you can use .223. And if things jam up, clear the jam and carry on in the process of breaking in your new carbine.

5) All the armorers are doing for folks who send their carbines in is wearing them in for the customer (or try to). You can do the break-in yourself. With ammo. At a range. Or an appropriate back yard. With targets. For fun.


Last edited by EricTheOracle; 02-26-2013 at 08:20 AM.
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Old 03-03-2013, 01:08 PM   #82
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I just got a Gen II 516. Built on 02-21-2013, purchased on 02-26-2013 right after they made it off the UPS truck and into the store (the store sold all 10 of them within 24hrs!).

First thing I noticed when I broke it down to clean it, is the BCG slides in the upper like its been hand polished to an extreme. Within the past month I added a Colt CAR-A3 Hbar Elite 20" and a Troy Carbine to my collection, both rifles were pretty tight with the BCG in the upper and especially when the bolt went to lockup. Even after shooting 2-300 rounds through the Troy and Colt they still don't feel as smooth as the 516 did new, and not even close now that its broken in.
I read about how a few people were having short stroking issues with their 516 rifles and that SIG would end up polishing feed ramps, chambers, etc. to try an fix the issue, so maybe they are doing all of this now from the factory? I also noticed that the chamber on my rifle is EXTREMELY shiny/smooth (much more so than my M1A, PSL-54C, P220 Combat and any other chrome lined barrel I have), so I will have to guess they polished the crap out of that as well. For reference my serial is 501x, hopefully all rifles past this point will have the polishing done to help alleviate any issues they were having.

As far as ammunition goes, those of you that are having problems with ANY type of ammunition (minus steel case Wolf, I wouldn't shoot that crap through my rifle) you need to send it back to SIG to get fixed.

I fired 55gr Lake City 5.56 NATO M193, 62gr Lake City 5.56 NATO M855 and 55gr Federal American Eagle Tactical AE223 .223 Remington through my 516 without 1 single hiccup at all (all done on normal gas setting). It actually ran so smooth, I found myself checking to see if it actually cycled the carrier a few times! I only ran 170 rounds through my rifle (bore snaked it 2-3 times after each 30rd magazine) and the last 50rds I fired back to back going 1rd every ~.75 second to heat up the barrel and burn off the crap on it from the factory.

The factory trigger was pretty horrible on the 516, a bit worse than any other mil-spec AR trigger I've felt. I ended up swapping in a Timney trigger with some KNS Gen II trigger pins before I even shot the rifle. Only other modifications are a Vtac padded sling (ditched the factory sling) with Midwest Industries 'low profile' button quick release swivels and a BCM Gunfighter (large latch) charging handle.

Best accuracy was with the American Eagle AE223, which I got 1 MOA with a HiLux CMR 1-4x 24mm on a American Defense Recon quick release mount (20 MOA base). It also shot the Lake City M855 very well, which was a relief. My Troy Carbine also has a 1:7 twist barrel but it can't shoot the M855 worth a damn.

I just pulled the HiLux CMR off and replaced it with a Leupold Mark IV Precision Long Range 4.5-14x 40mm. Will be able to get a better idea of what kind of accuracy my 516 is capable of the next time I get out to the range. I will try it on semi and then give it a go on single shot to see if it makes any difference at all with accuracy.
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Old 03-03-2013, 01:16 PM   #83
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By the way, my rifle has the "2nd gen" bolt carrier group, and not the "3rd gen" one. Any idea when they started using the "3rd gen" one in rifles, and why they might have switched back to the "2nd gen" one?

Looking at the picture of the three, it looked like the "3rd gen" one is actually made for a select fire rifle... and maybe that's why its not being put into current production rifles?

That or they are just getting rid of a batch of "2nd gen" bolt carrier groups they had left over. I looked over all 10 of the rifles that they got in at the store, and all had the same carrier in it.



Anyway, these are great rifles. I had a 716 but I sold it several weeks ago for $3,300. Couldn't pass that deal up! The 716 was a sweet rifle, but I honestly like the 516 a lot more. The 716 was just too heavy for what I wanted it for (a rifle to carry around at my cabin, which happens to be on top of a mountain and lots of steep terrain. Sucks to carry a heavy rifle around out there, and a solid copper .223/5.56 will get the job done on any hog here in Texas with a properly placed shot).
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Old 05-02-2013, 05:09 AM   #84
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How can you tell if you have a 2 gen or a 3rd gen? My 516 has a March 21, 2013 build date.
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Old 05-05-2013, 01:01 PM   #85
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516 Patrol Failure to cycle

I purchased my 516 about 30 days ago. On my first outing used Remington .223 55 grain and expierienced all the same FTF/FTE issues others have reported. Including customer service advising to clean and try again.

So I cleaned and tried again with the same results using PPC, Finnoci(?), Remington 55's. None would cycle the action properly! American Eagle 55's cycle ok in a ten round test. Tried some 62 grain also with same problems.

Contacted customer service again and sent the gun in to be serviced last Monday 4/29/13.

Will post results when returned and tested...................................
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Old 05-05-2013, 02:47 PM   #86
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Just back from the range doing virgin fire on my new 516. Born date 40 days ago. Very please with the quality and the quietness of it cycling. One thing I noticed is when cycling the bolt with no round it sounds "normal". With a round it is very soft and I wondered if it even went to battery. All worked ok,untill about 35 rounds and a no fire. At first I thought it hung fired and waited. Recycled and out comes a un fired round with NO marks on the primer. Hmmmn. It worked normally for 40 -50 rounds and did the same thing again. Not cool!!!
Prior to use the weapon was thourghly scrubbed clean and treated with Seal 1, 3 times and used a heat gun liberaly. Like hot to touch.
Brought the weapon home and did a thorough clean and lube again. Paying extra attention to bolt assy.
I have been using 556, 55 nato stuff some from Serbia and other is independence from Isreal. No marks on the cartridges that did not fire.
Going to give it another try and look at it closer if it happens again. Need to find out if it is going to battery and where the bolt is resetting.It will give me something to do.
BTW the beast is super accurate. Lot better than the m-16s I lugged around for over 20 years.
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Old 05-08-2013, 07:34 PM   #87
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Just picked up a new Sig 516 also.
I just inspected the rifle chamber, barrel etc but did not do any cleaning, ran a 50 round box thru it and I am pleased to report no problems whatsoever. Fired, fed and ejected absolutely perfectly.
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Old 05-13-2013, 10:44 AM   #88
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Whats up guys! Im new to the site. However, I recently purchased my first AR platform rifle. I went with the Sig 516 as well, and had the same issues during its first test run with the Remington 223 55 grain ammo. I would fire a round, and then it wouldn't strip the next round off the feeder. I am going to try to switch the gas valve position to position #2 and give it another go. I have some Federal XM855 5.56 Penetrators on the way. Once they arrive I will switch it back to position one and keep it there more then likely.

Also, how can you tell if you have a GEN 1 or GEN 2 model?
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Old 05-13-2013, 01:51 PM   #89
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Well just got back from the range. Put over 100 rounds of .223 down range and only had 1 miss fire on the #2 setting. Seemed to fire a lot better. Once the other rounds get here I am going to switch it back to the original setting.
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Old 05-13-2013, 03:53 PM   #90
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Can't afford the Heckler Koch 416/556 so I've been tempted to pull the trigger on a Sig 516 and I haven't entirely ruled it out...yet. But I do have two Colt 6920's which are DI and neither has ever had a FTF, FTE or FT anything. A lot to be said for that. The Sig has been put on wait and see....

Haven't heard anything about failure to anything on the HK 416 or MR556 either.
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Old 05-13-2013, 04:44 PM   #91
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I had similar issues with 223 ammo, but no issues with 556 ammo.But the trigger is horrible,just put a GEISSELE SSA-E and this weapon is a tactical motherf%$#@!.All i can say is my Sig 516 patrol now only gets 556 62 grain and I'm ok with that. Sorry to hear everyone having problems but from my experience ammo is the common factor.
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Old 05-13-2013, 05:22 PM   #92
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Quote:
Originally Posted by elchino View Post
I appreciate the advice and may just do that when it comes back to me again. I just can't find any 556 ammo (i am in south florida). I have 600 rounds of 223 on backorder from cabela's.

If I can find some 556 I will gladly order and try it. I really like this rifle, and if it works right I know I will love it!
Any thoughts on whether the recoil spring could be the issue here? A friend suggested I try a different one in case this is the reason the gun isn't feeding/cycling. The 516 is a mil-spec correct? I found a ciouple of mil-spec springs for under $10 and would be willing to give it a shot - but if it is completely crazy to think the spring could be the issue let me know!

------

Which is the adverse setting? I have four dots on mine and it is set to 12 and 6 Oclock which corresponds to dot #2 on my gas setting.

The fourth is actually an X. Is adverse setting 1 or 2? When I set it to 1 it fires a single shot only and I have to pull the charging handle to load another round.

What setting is the third dot?
I think the x mark is for single shot. If you inspect the gas piston you see the 3 different size gas pick up holes and notice no hole br the x position.
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Old 05-13-2013, 07:04 PM   #93
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Quote:
Originally Posted by WeaponX24 View Post
Well just got back from the range. Put over 100 rounds of .223 down range and only had 1 miss fire on the #2 setting. Seemed to fire a lot better. Once the other rounds get here I am going to switch it back to the original setting.
Did you clean and lube your rifle before you started breaking it in?
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Old 05-14-2013, 03:40 PM   #94
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Originally Posted by Softailsniper View Post
Did you clean and lube your rifle before you started breaking it in?
Yes
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Old 05-14-2013, 04:06 PM   #95
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Quote:
Originally Posted by elchino View Post
I appreciate the advice and may just do that when it comes back to me again. I just can't find any 556 ammo (i am in south florida). I have 600 rounds of 223 on backorder from cabela's.

If I can find some 556 I will gladly order and try it. I really like this rifle, and if it works right I know I will love it!
Any thoughts on whether the recoil spring could be the issue here? A friend suggested I try a different one in case this is the reason the gun isn't feeding/cycling. The 516 is a mil-spec correct? I found a ciouple of mil-spec springs for under $10 and would be willing to give it a shot - but if it is completely crazy to think the spring could be the issue let me know!

------

Which is the adverse setting? I have four dots on mine and it is set to 12 and 6 Oclock which corresponds to dot #2 on my gas setting.

The fourth is actually an X. Is adverse setting 1 or 2? When I set it to 1 it fires a single shot only and I have to pull the charging handle to load another round.

What setting is the third dot?
I just got my 516 last week. So far very happy with it. As far as the gas valve settings call sig and have them email you the correct owners manual. My rifle was built 4/11/13 and had the old manual. Once a read the correct manual the settings became crystal clear

Mike
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Old 05-15-2013, 07:36 PM   #96
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I guess I got lucky. I found this forum while doing research on the 516. Because I load my own and seldom purchase ammunition, I was on the fence when I started reading that the rifle prefers full pressure NATO spec ammunition. Out of the box, I gave it a very basic cleaning and inspection then lubed it with some Schaffers 5w30. I ran 1 mag of m855 through it without any problems. Took it home, installed a Jerry Miculek compensator , a Rock River 2 stage trigger, and mounted my Vortex 1-4 Razor in an ADM mount. Went back to the range and repeated the full mag of m855 again, without any problem. After that, I ran through 200 of my m855 clones without a problem. My clones are loaded with various brass, cci 41 primers, 62 grain armscor bullets, and 24 grains (not a hot load at all) of wc844 pull down powder. This weekend I will do some accuracy testing. Over all I am very pleased with the rifle. I wish more of you guys had a similar experience.
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Old 05-22-2013, 06:37 PM   #97
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If anyone is still unhappy with their SIG 516 FDE I would be happy to purchase it from you.

Please get in touch.
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Old 05-23-2013, 12:06 AM   #98
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Originally Posted by Sig228Nut View Post
It's no secret that there are a lot of problems at today's Sig Sauer. This is not the same company that made the world's finest firearms 20 years ago.

Pound on customer service until you get the answer you want.
It is also not a secret the you have no like for anything sig or the folks running the company especially the CEO.
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Old 05-27-2013, 11:24 AM   #99
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Update On .223 516 Patrol Issues

First Sig turned my gun around quickly!! Great service. They polished the chamber etc. Sent a note with the gun saying they fired 30 55gn rounds with no priblems encountered.

So I took the gun to the range s/u according to the manual and cleaned. It shot more reliably but still has failure to feed, double feeds, failure to stay open on empty intermittently with no discernable reasoning, multiple brands of ammo were tried including PMC, Remington and other majors.

Called Sig service and they said I should use the 11:00 gas setting for all 55 grain ammo. So back to the range with the new setting. Most mfgrs. ammo worked without problems. Some Remington ammo on stripper clips that I purchased some time ago still had problems. Oddly, Wolf brand now worked reliably - prior wouldn't feed at all! At this point I've began to trust the rifle a little.

I'm working up some hands loads using quality powder and bullets and will do more testing this week. To see at what load level the problems may dissapear at.

Again the rifle functioned better after Sig worked on it. Still not as realiably as it should. If the rifle is not designed to shoot 55 grain ammo they should clearly state such in their advertisement. Then the problem would lie with the purchaser - instead of the seller!!..................
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Old 05-27-2013, 11:44 AM   #100
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Know what, I genuinely feel bad that there are some of you guys with these problems.

Would you consider trying to run your rifle with a heavily greased interior?

I use NLGI 2 + thin layer of oil OR NLGI 1 grease; I layer the entire interior of the receiver and the buffer tube, much like the way you'd layer butter on the baking pan before baking a cake.

The bold head and cam pin are heavily greased as well (and, unintentionally, the chamber walls are probably slippery).

The gas block + piston only needs some oil, but I also grease the area which fits right into the receiver.

Mine runs absolutely smooth this way.
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