Sig 556 wear and tear after 1500 rounds.

[briansmithwins]

Thought I'd do a review of my Sig 556 after its had a few rounds thru it. So far I've run about 1500 rounds thru this rifle: mostly PMC but some Hornandy, Federal, and Tula. So far I've had 1 malfunction, a failure to fire. Of course, this occurred during a rifle match, while the timer was running. I didn't recover the round so I don't know if it was defective or if it got a light hit.

The assembled rifle. Pretty much stock Sig 556 Classic.


Flash hider wear. Flash hider is from PWS and has been installed since I got the rifle.


Receiver wear from the cartridges impacting the side of the receiver. They all so that and they all dent cases too.


Field stripped. Little more complex than the parent AK design.


Gas piston head.


Gas regulator. No signs of erosion.


Bolt striped. The extractor is not normally removed except to replace it.


Bolt face wear.


Trunnion showing cam wear on the initial rotating cam.


Trunnion showing where the bolt carrier impacts on the right side.


Receiver rail wear.


Ejector.


Bolt carrier.


Receiver buffer plate.


FCG.


To summarize, I'd classify all the wear on this rifle as being parts polishing themselves in. I haven't seen any signs of peening or other destructive wear. The parkerizing has worn off in places and the paint has too, but there just isn't any metal being removed in significant amounts.

BSW

 

[Jim Watson]

What's that in the third picture, rear of the ejection port, below the "reflex" logo on the sight? It looks like a white fractured surface broken out into a screw hole or spring tunnel.

 

[briansmithwins]

On the sight or the rifle?

BSW

 

[Jim Watson]

On the rifle in the ejection port just ahead of the brass tracks. Looks like a shallow white U with a coil or thread in the lower right corner.

 

[Driftertank]

Bolt handle retainer. To remove the BCG from the gas piston assembly, you push down on the serrated tab above the spring which releases the bolt handle to pull out to the right and separates the BCG from the gas piston.

The recoil spring on the 556 is captured in the gas tube, the bolt handle passes through the little flat part visible on the far left of the piston rod in the "disassembled" picture and mates the rod to the bolt carrier. The catch for the bolt handle pivots up when the serrated tab is pushed down. The spring you see holds the catch closed.

 

[rb288]

Thought I'd do a review of my Sig 556 after its had a few rounds thru it. So far I've run about 1500 rounds thru this rifle: mostly PMC but some Hornandy, Federal, and Tula. So far I've had 1 malfunction, a failure to fire. Of course, this occurred during a rifle match, while the timer was running. I didn't recover the round so I don't know if it was defective or if it got a light hit.

The assembled rifle. Pretty much stock Sig 556 Classic.
IMAGE#1

Flash hider wear. Flash hider is from PWS and has been installed since I got the rifle.
IMAGE#2

Receiver wear from the cartridges impacting the side of the receiver. They all so that and they all dent cases too.
IMAGE#3

Field stripped. Little more complex than the parent AK design.
IMAGE#4

Gas piston head.
IMAGE#5

Gas regulator. No signs of erosion.
IMAGE#6

Bolt striped. The extractor is not normally removed except to replace it.
IMAGE#7

Bolt face wear.
IMAGE#8

Trunnion showing cam wear on the initial rotating cam.
IMAGE#9

Trunnion showing where the bolt carrier impacts on the right side.
IMAGE#10

Receiver rail wear.
IMAGE#11

Ejector.
IMAGE#12

Bolt carrier.
IMAGE#13

Receiver buffer plate.
IMAGE#14

FCG.
IMAGE#15

To summarize, I'd classify all the wear on this rifle as being parts polishing themselves in. I haven't seen any signs of peening or other destructive wear. The parkerizing has worn off in places and the paint has too, but there just isn't any metal being removed in significant amounts.

BSW

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[Dreamliner787]

Very nice and thanks for sharing.

 

[MTMilitiaman]

Thanks for sharing. This is one of the more interesting poodle shooters on the market, IMO, and about the only one that continually catches my interest everytime I see something on it.

Most of the reviews I read of the rifle indicate the trigger is so-so. Seems by most accounts to run in the 7 to 8 pound range. I was wondering what your thoughts on the rifle's trigger is and whether it has gotten better with some use.

Also, is the barrel chrome lined?

 

[briansmithwins]

The stock trigger is a very good example of the 2 stage type. The first stage is kinda chunky and then the trigger just stops and the second stage breaks cleanly.

I've actually replaced the seat with a aftermarket piece that cleaned up the first stage and made the second stage even better.

The barrel isn't hardchromed, it has a nitride coating, inside and out. Leaving out wear resistance I'd rate the nitride as being more corrosion resistant than hardchrome. See my 556R review for details.

BSW

 

[Walkalong]

I got the hots for one and found a deal on GB. I love mine. No regrets.

 

[Averageman]

I hope you have good luck with it.
I had a bad one, Barrel to reciever misalignement and it wouldn't zero. After a couple weeks of drama and letting numerous other people see it; Sig finally took it back.
Do a search for everything I posted about the trouble with mine here, then decide if a Sig 556 is for you.
After two of their rifles failing on me and six months of drama including even getting the VP of sales in the mix; I can only say "Never Again."
I have told this story here numerous times, but I refuse to not let people know that Sig Q/A, Q/C might be the worst in the black rifle Industry.

 

[Averageman]

Check here,
http://www.thehighroad.org/showthread.php?t=552927&highlight=Sig+556
It sertainly wasn't a good rifle for me.

 

[briansmithwins]

I hope you have good luck with it.
I had a bad one, Barrel to reciever misalignement and it wouldn't zero. After a couple weeks of drama and letting numerous other people see it; Sig finally took it back.
Do a search for everything I posted about the trouble with mine here, then decide if a Sig 556 is for you.
After two of their rifles failing on me and six months of drama including even getting the VP of sales in the mix; I can only say "Never Again."
I have told this story here numerous times, but I refuse to not let people know that Sig Q/A, Q/C might be the worst in the black rifle Industry.

You're not alone. From what I've read the earlier 556's had lots of problems. I've dealt with Sig CS before and have had them replace a pistol that wouldn't work with a new one.

Sig seems to have corrected their earlier problems with the rifles. Not that any manufacturer can't turn out the occasional lemon.

BSW

 

[pat701]

I love mine not a problem in 1200 rounds. Great trigger for a combat rifle.