First jam on the new Sport II

Tinhack

Tinhack

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Well I had my first stinking jam today while zeroing a new night vision scope. The AR is only 18 days old and the first time I've had a chance to fire live rounds. Had to stop and take it into the house and use tools to unjam it. The bolt would not go into battery or pull back. After prying the bolt back, it's a good thing it didn't go into battery or I would have pulled the trigger. The round was bent and lodged in the chamber. Looks like it didn't feed right and got bent by the bolt going forward. Pretty good ding in the side of the casing with a noticeable cant to the bullet.

Sure ruined my plan to burn up some rounds before lunch. :(
 
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What mag are you using?

did it happen right off the batt? or after multiple shots out of the same mag?
 
Well, crud. That's no fun.

The only times I've had an AR bolt lock up on me was while shooting TulAmmo. Tul has done that to me twice now. I'll shoot up what I have, but I won't be buying more. I've shot a lot of Wolf both Polyformance and Military Classic without issues. I've also never had the issue with any brass cased ammo.

Were you shooting Tul by any chance?
 
It was all brand new Federal FMJ. I had already put about 20 rounds through it. The first 10 was trying to figure out why I was getting flyers. Couldn't zero for squat. Finally figured out I had the rifle cinched down too tight in the Caldwell Lead Sled. Removed the Velcro tie and did a one-shot zero. (Digital scope) The rest were just getting used to the trigger and getting a good group of threes. Then it just jammed.

I'm using MagPul Gen2 Pmags just like what came with the rifle. I don't know if it was the one that came with the rifle or one of the three I bought at the same time. All four are identical and I didn't mark them.

I do know the bolt was pretty stiff in the BCG when I first cleaned it after buying the rifle but figured it would free up with use. When I finally got the BCG out, I pulled the bolt and cleaned it better then added a little Tetra Gun Grease. That made a huge difference and the only drag seems to be caused by the gas rings. But it's a smooth drag now. I also checked the chamber and didn't see any damage.

I'll take it back out tomorrow morning and try to throw some rounds down range. I just came in from sighting the laser to match the scope zero and the mosquitoes were out in force. It had to be dark enough see the laser spot on the target or so I thought. The dot showed up in the scope even in daytime mode. I was going to go into nighttime mode when it got darker but too many mosquitoes.
 
How many rounds did you have in the mag, when you first inserted it?
any chance it was not all the way locked in, and migrated down a tad after shooting for a minute?
 
I started with a full 30 rounds. It was locked in. I had to use the release to get the mag out during diagnostics. I couldn't see it but I was pretty sure there was a round in the chamber and that made me a little anxious while trying to work the bolt back and forth at the range bench. Even more so when I brought it indoors to work on it.

With the bolt moving easier now, I'm hopeful the problem is gone.
 
There was another thread recently about someone having their S&W Sport II bend bullets. You might want to locate it and follow what happens with it.
 
TX-Dennis said:
Well, crud. That's no fun.

The only times I've had an AR bolt lock up on me was while shooting TulAmmo. Tul has done that to me twice now. I'll shoot up what I have, but I won't be buying more. I've shot a lot of Wolf both Polyformance and Military Classic without issues. I've also never had the issue with any brass cased ammo.

Were you shooting Tul by any chance?
Click to expand...
There is a 100% cure for that; the BCM Extractor Upgrade Kit. Check out youtube, there are several videos on there about it. :)

BCM SOPMOD Bolt Upgrade/Rebuild Kit
 
Me and my father in law just went to the range Tue so I could zro my sport II and DD for the first time.

Luckily we put about 200 rds through each without a single bad round using gen II Pmags.

I was using Wolf 55gr on my sport II and 62gr on my Daniel Defense.

Hopefully you get your issue figured, I would have been hot if I had any problems from a brand new riffle the first time I fired it.
 
Disabled1 said:
There is a 100% cure for that; the BCM Extractor Upgrade Kit. Check out youtube, there are several videos on there about it. :)

BCM SOPMOD Bolt Upgrade/Rebuild Kit
Click to expand...

That couldn't hurt, but my problem wasn't an empty casing stuck in the chamber. It was similar to the OPs issue with a slightly bent/crushed live round that wouldn't fully chamber and jammed the bolt partially open. The extractor held onto the round just fine, but it was extremely difficult to exert enough force on the charging handle to get it out. It's more than a bit uncomfortable trying to beat on the charging handle with a live round in there. I wound up using the edge of the shooting table to force it open, but it was not a good feeling having to do that. Maybe I need an aftermarket charging handle of some sort.

I chalked mine up to the fact that steel casings are less slick than brass since I've only had the issue with Tul. I could be wrong, though since the OPs occurred with Federal brass.
 
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TX-Dennis said:
That couldn't hurt, but my problem wasn't an empty casing stuck in the chamber. It was similar to the OPs issue with a slightly bent/crushed live round that wouldn't fully chamber and jammed the bolt partially open. The extractor held onto the round just fine, but it was extremely difficult to exert enough force on the charging handle to get it out. It's more than a bit uncomfortable trying to beat on the charging handle with a live round in there. I wound up using the edge of the shooting table to force it open, but it was not a good feeling having to do that. Maybe I need an aftermarket charging handle of some sort.

I chalked mine up to the fact that steel casings are less slick than brass since I've only had the issue with Tul. I could be wrong, though since the OPs occurred with Federal brass.
Click to expand...

I was afraid of breaking the thin aluminum charging handle so I used a padded screw driver and pried the bolt back. It took some good effort as I tried first to push the bolt into battery. As soon as the round cleared the chamber it ejected just fine. Here's a couple of pictures of the round.
 

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I didn't take pictures, but that's very similar to what mine looked like. I didn't worry too much about the charging handle breaking. They are relatively cheap to replace compared to a BCG.

If it does that to you again it may be time to send her in.
 
Tinhack said:
I'm using MagPul Gen2 Pmags just like what came with the rifle. I don't know if it was the one that came with the rifle or one of the three I bought at the same time. All four are identical and I didn't mark them.
.
Click to expand...

But do you by any chance know which one was in use when this issue happen?..

if so, leave it at home, and try another.. Even though they are new, good named Mags, ya never know? maybe a lemon made it out of the factory?

And how bad the shell is bent, I'm trying to figure out how a BCG could cause that, by its self?
even if it had excess drag, I cant see it doing that?..

Anyway, a Short time back, I had a shell jam really bad my self, I thought for sure I was gonna break the charging handle trying to jerk it back.. in my case it turned out to be an old GI mag I was trying out, but again, whats to say a newer, good brand, well known to be dependable mag, did not in fact, act up?..

http://smith-wessonforum.com/smith-wesson-m-p15-rifles/514707-ammo-mag-issue.html
 
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Yeah, I know they're cheap but I'm about a 50-mile round trip from a stocking dealer or a week away from an online order delivery. :) I guess that should be an item in my spare parts box?

Had too many side-tracks this morning so couldn't get back out early to shoot. I'm on the way out now. I'll be back after lunch to report. I still have a red dot to sight in for it too.
 
Pro2nd said:
But do you by any chance know which one was in use when this issue happen?..

if so, leave it at home, and try another.. Even though they are new, good named Mags, ya never know? maybe a lemon made it out of the factory?
Click to expand...

I'll try another mag. The one I was using hasn't been reloaded yet so I know which one THAT is. I'll try a few rounds of my hog killers also and see how they shoot. I only have two types of ammo at the moment--It's NEW! ;)
 
Tinhack said:
I was afraid of breaking the thin aluminum charging handle so I used a padded screw driver and pried the bolt back. It took some good effort as I tried first to push the bolt into battery. As soon as the round cleared the chamber it ejected just fine. Here's a couple of pictures of the round.
Click to expand...

So was this a double feed? Looking at the round it has the markings of another round hitting the middle of the round pictured.

I dealt with this a lot when I was a Drill Sergeant at Ft Benning for two years, thats just what the double fed round looked like.
 
Does the bolt close on a double feed? I would think not. I assumed the marks were from the breach as the round went in. I put my little finger into the breach and the machining is like razor blades in there. :eek:

I'm 10-7 for a while. Over...
 
Semi-auto's occasionally jamb....ammo , magazine dirty action.....
Just a fact of life . Don't let it bother you...un-jamb and Carry On.

May be the first but it won't be the last !
 
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