Tried out a coworker's new Sig 556 today. It has a a quirk or two that I am curious about.
Today a coworker of mine who is new to firearms invited me to the range to try out his new Sig 556 and help him sight it in. It seems like a decent rifle, but I have a few questions about what I saw today.
The first thing is that the bolt would not always pick up a round when released from the locked open position. It did this with two of my pmags as well. It never had any issues with this when the bolt cycled from a shot, nor did it fail to pick up a round when the bolt was cycled manually. Is this a common problem? The gun is literally brand-new.
The other thing is that it let off a three or four round burst when he shot it one time. I'm thinking that it is possible that he inadvertently bump-fired it. Another possibility is that it may have been a slam-fire with soft primers in the PMC .223 that he was firing, though this seems unlikely since it only happened once, and it was three or four shots that were fired in one (and only one) burst. Are these rifles noted for going rock and roll, or did he just shoot it the wrong way?
sounds like he needs to have sig take a look at it...my sig 556 does not have any problems like that.
Its a new firearm give it a little break in.
My BCM would jam when new.
I had to blame the old 1989 guatamalen ammo as
well as a new upper.Runs fine now even with the old
ammo.
The burst could be a problem.
I had an Ar15 burst a timw or two but found that it was the ammo a few rounds were under powered and did not push the bolt back far enough to catch the sear.
Shoot it for a hunderd rounds and then see what it runs like.
I doubt it's a slamfire. It doesn't have a floating firing pin like an AR15. Every now and then you may get a "High" primer and the bolt closing on it could set it off but it's rare.
Originally Posted By backpacker21:
I doubt it's a slamfire. It doesn't have a floating firing pin like an AR15.
There is an answer I was looking for. I told him that if it ever does something like that again, it needs to go back to Sig RTFN, but I am still thinking that he simply bumpfired it by mistake.
Sounds like it may need to go back. I've been on this forum for quite a while and this is the first I have heard of the problem. The last thing your buddy needs is for a member of LE or ATF hearing that rifle auto fire if he doesn't have a Class 3 for an automatic weapon.
Originally Posted By Gingerbreadman:
Originally Posted By backpacker21:
I doubt it's a slamfire. It doesn't have a floating firing pin like an AR15.
There is an answer I was looking for. I told him that if it ever does something like that again, it needs to go back to Sig RTFN, but I am still thinking that he simply bumpfired it by mistake.
Well
I had a friend have exactly thta happen with an Olympic Ar15 where if you pulled the trigger slowly it would rock and roll. It was hit or miss if you could get it to do it but we were at teh range and an ATF guy was there and walked over to see if he had paperwork. The agent opened the gun and lookm at it and handed it back to him and told him he should send it back to the manufacturere to get it fixed. He saw that it was a malfunctioin and that the gun had no M16 parts and had not been tampered with. He was a real nice guy. Even let us shoot his MP5.
Originally Posted By StonerAR10:
The agent opened the gun and lookm at it and handed it back to him and told him he should send it back to the manufacturere to get it fixed. He saw that it was a malfunctioin and that the gun had no M16 parts and had not been tampered with. He was a real nice guy. Even let us shoot his MP5.
Fortunate friend. Try it out with different ammo. Send it back to SIG if it continues as the burst fire would be concerning. While they're looking at that issue, they may as well fix the bolt as well.
