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Discussion Starter #1
i was at the range today shooting my stag mod1 after firing about 80 rnds i was in the middle of a rapped fire string at 200 mtrs and BOOM the upper receiver blewup.
the hole reserve was totaled the bolt cracked barrel extension split in 3 places. i am OK just some pouter burns on my hand and some blood blisters on my thumb and it is bused bad.

i was shooting S&B SS109 ammo ... good stuff never had any probs with them so not sure what happened ither a hot load or ... a slow burn ???
any one elts ever have a stag blowup?? if so what did stag say it was ?
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i will have pix of the gun as soon as my dealer sends me the ones he took
 

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Wow. The most important thing is that you are OK. The AR is just a piece of metal. Do you remember if the round before that fired OK?
 

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Discussion Starter #3
yah it seemed to be ok i was in the zone but i did not notice anything out of the ordinary

i will post the report from stag when they send it tome they sed they will send me a new gun with the same SN :p
 

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Glad your OK. Sorry to hear about the rifle but it sounds like they are going to take care of it
 

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Ok lets work thru this as it takes a tremendous amount of pressure to blow apart a STAG. You said you were firing a at a fast rate of fire correct? So you didn't have a failure to feed or eject and manual chambered another round and then it blew correct?

A load hot enough to blow frag a non-defective barrel extension is normally in excess of 100 PSI.

Normally stuff like this is from a squib load and chambering another round and setting it off whihc creates about 120-150K PSI and hopefully the case or bolt is all that blows.

How many rounds do you have thru this gun, barrel, bolt?

How much of this current lot of ammo have you shoot?

Anyone else have some of the same lot of ammo you know you can check with?

Where were spent cases ejecting at before this happened?

Do you have any of the spent cases from this range session? How do thy look? Any pictures you can post of them along with the gun?

It happens so fast you don't have time to be scared until after the fact when you are counting digits and looking for a mirror to see if you have any frags in you face or parts of it missing. :wink:


I am glad you contacted STAG and they are taking are of it make sure to contact SB as well. If the ammo was OK then there almost had to be a really big issue with STAG and it sounds like it was metallurgical. Defective barrel extension ?
 

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Discussion Starter #6
Tim_W said:
Ok lets work thru this as it takes a tremendous amount of pressure to blow apart a STAG. You said you were firing a at a fast rate of fire correct? So you didn't have a failure to feed or eject and manual chambered another round and then it blew correct? yah i was rnd #7 out of a 10 round string all loaded by the action

A load hot enough to blow frag a non-defective barrel extension is normally in excess of 100 PSI.

Normally stuff like this is from a squib load and chambering another round and setting it off whihc creates about 120-150K PSI and hopefully the case or bolt is all that blows.

How many rounds do you have thru this gun, barrel, bolt? about 500 i just gut the gun in oct when i gut home from iraq

How much of this current lot of ammo have you shoot? only about 80 rnds the first batch of ammo was some wolf 68gr i used to break it in

Anyone else have some of the same lot of ammo you know you can check with? i called S&B they say they have no reports of and probs they asked fore photos of all the ammo i shot today my gunsmith is doing this atm with a wright up , witch i will post when i get it from him

Where were spent cases ejecting at before this happened? they were all in a small groop at about the 3oclock

Do you have any of the spent cases from this range session? How do thy look? Any pictures you can post of them along with the gun? after i picked up the brass there were slight swipes on them but nothing wears then i see on any ss109 i have shot with the army, i am just learning about ammo/presser and soon and stuff i wish i knew more atm so i could give more info i will have pix of the gun and ammo tomorrow probably do not have a camera

It happens so fast you don't have time to be scared until after the fact when you are counting digits and looking for a mirror to see if you have any frags in you face or parts of it missing. :wink: LOL yup


I am glad you contacted STAG and they are taking are of it make sure to contact SB as well. If the ammo was OK then there almost had to be a really big issue with STAG and it sounds like it was metallurgical. Defective barrel extension ?
 

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#1 thing you are OK
I had a bad accident with a ww2 F/A sten it double fed and blew,got 9mm scrap in my face and hand but it was fun to shoot :eek:
i luv ww2 F/a weapons, :) nothing like shooting a MG42 f/a from the hip at a fridge...rambo aint got nothing on that 8mm LOL
 

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dasu said:
Tim, what would ejection pattern have to say about a KB?

Pressure. If the rounds were super hot then the timing would be advanced and th ejection pattern would move from say a normal of 4 O'clock to say 1 O'clock.


Based on no squib load, the description of the cases, and a super low round count, I would say almost positively a defective part of the STAG upper. Probably something with the barrel extension based on the damage you stated.
 

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Discussion Starter #11
yah i am just worried now about the rest of the 1k rounds i have from that batch of ammo and the stag 6.8 i am picking up tomorrow i know it was just a fluke but .. can shake you up a little if i had my thumb over like 1/8 of an itch more i would have lost it i know from now on i will be using my front battle grip instead of the mag well even on the bench ofc i will probably be back at the range tomorrow as soon as i pickup the stag 6.8 :) i am a sucker fore punishment i ges might even bring my Mauser with me tomorrow so the pain in my shoulder will over ride my thumb :lol:
 

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Discussion Starter #12
o yah thank you all for everything the pix will be up soon and i will post the report from stag once they do there investigation and send it to me
and thank you Tim_W
 

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Just picturing you wearing a motorcycle helmet with full body armor on while training thru a tactical shooting course. :lol: :lol: :lol: :lol: :lol: :lol:
 

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Discussion Starter #14
LOL nah i have cleared alot of rooms :lol: :lol: i am axuley thinking on sinning up fore the 6.8 class if i can get a car that can drive that far
would like to get involved in tach shooting more then just in the army also but up here in RI there is no place that dos it :cry: just like the longest range here is 200 yards
 

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zoli818 said:
#1 thing you are OK
I had a bad accident with a ww2 F/A sten it double fed and blew,got 9mm scrap in my face and hand but it was fun to shoot :eek:
i luv ww2 F/a weapons, :) nothing like shooting a MG42 f/a from the hip at a fridge...rambo aint got nothing on that 8mm LOL
Zoli... an MG42? Nice, that's like 1200 RPM !!

I am curious to see the pics of the Stag too. At first report I would have said a squib round also. That's happened to me before, but I noticed the difference in recoil before pulling the trigger again. Sure enough, the bullet was in the bore. Too close for comfort. I watched the torture tests on G&A TV and they have successfully fired rounds behind bullets still in the bore in a couple guns and the rifle held together. You never know though. Years ago when I was a kid, a TX DPS trooper family friend had a 357 with a blown up top strap and cylinder from a bad load accident. He kept the pistol mounted in a frame on the wall.
 

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Discussion Starter #16
yah the only weird thing is i have never seen a squib load axially fully cycle the weapon and lode a round usually it dose not cycle the gun and someone hand jams the next rnd ? if it is a squib i am just surprised and inbarest i didn't nodes it :cry: i have bin firing ARs fore well over 10 years.
i will let every one know as soon as i get the report back from stag and the pix will be up soon™
 

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You're right, my squib didn't have the usual recoil and had a muffled retort. The ejection wasn't complete either. Luckily I didn't just do a tap, rack, bang clearance drill because the bullet was definitely in the bore. A cleaning rod with a round tip on it pushed the bullet through the rest of the way. I'm thinking yours either had a horribly overpressured round, maybe a defect in the extension or chamber area could do it also. Who knows? Let us know what you find out though. Stag has a solid warranty so you'll come out fine. Glad you weren't hurt severely.
 

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I have seena few AR's go boom from ammo issues, I am glad you are okay.
 

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When you consider you can easily load a round that doesn't cycle the gun yet is still doing over 1200 FPS the chance is 0 that a round that would cycle the gun would still be in the bore. It is also very very doubtful you could pack enough powder into that load to cause this to happen with jsut one round rememeber all his other cases looked fine. Also if it was a hue headspace issue the cases would have shown it. The only answer I can see possible is a defect in the barrel extension or the barrel or something in that area but it had to bee a defect. Rememeber a few years back the bad SAKO barrels that banana peeled back from normal loads. Metallurgical issue. Considering we get most of our steel from china and th quality is spotty at best. The fact this happened in the first100 rounds as well is jsut screaming defect. Maybe a stress crack that let loose finally.
 

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I skimmed all the posts and that sucks dude.

But Please contact S&B too. They might have had a bad run. Never now.
You might have an ammo issue. Most gun kaboomies are ammo related that I have seen. And thats quite a few.
 
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