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[ARCHIVED THREAD] - KABOOM (Page 1 of 5)
Posted: 7/21/2014 7:16:15 PM EDT
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Sorry for the multiple posts, I'm new to posting but I've been reading posts for years. I had a catastrophic failure yesterday when shooting my new build for the first time. I wanted to build a very light Ar and I basically bought all the parts on this link: http://www.tactical-life.com/magazines/building-lightest-ar-rifle-video/?scrape=true I had a gun shop put together the upper and I grabbed a bag of MBI 55gr ammo. I bought 1,000 rounds of this ammo a few years ago from Lucky Gunner and I've shot about 500 without any problems. It's supposed to be "quality" remanufactured ammo that I bought back when 5.56 was hard to get. At the range I loaded a Magpul mag with 10 rounds and had 2 stovepipes. Then I loaded another mag with 20 rounds and had another stovepipe at about 8-10 rounds. After clearing it I started shooting again without any issues and then I did rapid fire with the last maybe 5-6 rounds when suddenly the gun exploded. I did not sustain any significant injuries other than a few minor cuts and scratches on my left forearm/biceps. My friend next to me said that he thought the ammo sounded louder than usual. I have narrowed it down to two possible causes: upper not headspaced correctly or improperly loaded ammo. Any advise on the possible cause will be greatly appreciated. Thank you. |
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Sorry for the multiple posts, I'm new to posting but I've been reading posts for years. I had a catastrophic failure yesterday when shooting my new build for the first time. I wanted to build a very light Ar and I basically bought all the parts on this link: http://www.tactical-life.com/magazines/building-lightest-ar-rifle-video/?scrape=true
I had a gun shop put together the upper and I grabbed a bag of MBI 55gr ammo. I bought 1,000 rounds of this ammo a few years ago from Lucky Gunner and I've shot about 500 without any problems. It's supposed to be "quality" remanufactured ammo that I bought back when 5.56 was hard to get. At the range I loaded a Magpul mag with 10 rounds and had 2 stovepipes. Then I loaded another mag with 20 rounds and had another stovepipe at about 8-10 rounds. After clearing it I started shooting again without any issues and then I did rapid fire with the last maybe 5-6 rounds when suddenly the gun exploded. I did not sustain any significant injuries other than a few minor cuts and scratches on my left forearm/biceps. My friend next to me said that he thought the ammo sounded louder than usual. I have narrowed it down to two possible causes: upper not headspaced correctly or improperly loaded ammo. Any advise on the possible cause will be greatly appreciated. Thank you. |
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I was told they were made of plastic. Sorry if that is incorrect. I would guess Mag in the name equals magnesium. It didn't look like it failed like a forged 7075 upper would, but that extension takes the cake. That upper could have been made of adamantium and that round still would have popped its cork. |
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Misleading thread title is misleading. Should be "another remanufactured ammo kaboom." It's always remanufactured ammo...always... ^This. Your title is misleading and it unfairly implicates Mag Tactical. The barrel extension is steel and it blew apart too. I don't think it was a problem with you upper receiver. |
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Did anyone else notice the mag catch is sheared? That seems unlikely to me. It's riveted/swaged right there, I believe, so if it blew outwards, that's the most likely failure point. I bet if he measured his mag catch spring, it's shorter than it ought to be. |
Huh. Looks like the KMR is still intact. Would need a new barrel nut and anti-rotation tab, but other than that...
Yeah, that's definitely overpressure, I'd think a squib would've warped the barrel before blowing out the extension. Doesn't seem like the barrel is bulged out, but I can't see too well under the handguard.(Well, that and I've got pretty shitty eyesight) Maybe a headspace problem? But would that blow up the barrel extension and the receiver? Someone said pistol powder in the cartridge; that'd do it, but I'm thinking it was also overcharged. First time I've ever seen an AR barrel extension blasted apart like that along with the receiver. That BCG would make a nice paperweight, though. A reminder of what can happen when you use bad reloads. Dudeman was lucky to not get hurt too badly. Here's hoping that MBI takes care of you, OP. Also, this is exactly why the magwell grip is highly frowned upon. 
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The KMR is pretty much intact. I was able to remove the extension and the barrel nut. The barrel seems ok except for the stuck casing. I can see the rifling and everything looks great inside.
I'm definitely not buying reloads ever again! Those were the only ones I've ever bought. |
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^This. Your title is misleading and it unfairly implicates Mag Tactical. The barrel extension is steel and it blew apart too. I don't think it was a problem with you upper receiver. Quoted:
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Misleading thread title is misleading. Should be "another remanufactured ammo kaboom." It's always remanufactured ammo...always... ^This. Your title is misleading and it unfairly implicates Mag Tactical. The barrel extension is steel and it blew apart too. I don't think it was a problem with you upper receiver. Yep. that's a big clue there. |
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Sorry for the multiple posts, I'm new to posting but I've been reading posts for years. I had a catastrophic failure yesterday when shooting my new build for the first time. I wanted to build a very light Ar and I basically bought all the parts on this link: http://www.tactical-life.com/magazines/building-lightest-ar-rifle-video/?scrape=true I had a gun shop put together the upper and I grabbed a bag of MBI 55gr ammo. I bought 1,000 rounds of this ammo a few years ago from Lucky Gunner and I've shot about 500 without any problems. It's supposed to be "quality" remanufactured ammo that I bought back when 5.56 was hard to get. At the range I loaded a Magpul mag with 10 rounds and had 2 stovepipes. Then I loaded another mag with 20 rounds and had another stovepipe at about 8-10 rounds. After clearing it I started shooting again without any issues and then I did rapid fire with the last maybe 5-6 rounds when suddenly the gun exploded. I did not sustain any significant injuries other than a few minor cuts and scratches on my left forearm/biceps. My friend next to me said that he thought the ammo sounded louder than usual. I have narrowed it down to two possible causes: upper not headspaced correctly or improperly loaded ammo. Any advise on the possible cause will be greatly appreciated. Thank you. Holy shit. I haven't been around all that long but I've never seen anything like that. Glad your ok and sorry about your rifle that sucks. |
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OP, If you send me all those blown up parts, I will send you a BALIOS-lite receiver set to replace them. Quoted:
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http://i40.photobucket.com/albums/e206/docxylo/image_zpsc4fbb66c.jpeg OP, If you send me all those blown up parts, I will send you a BALIOS-lite receiver set to replace them. THAT, ladies and gentlemen, is good business. |
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^This. Your title is misleading and it unfairly implicates Mag Tactical. The barrel extension is steel and it blew apart too. I don't think it was a problem with you upper receiver. Quoted:
Quoted:
Misleading thread title is misleading. Should be "another remanufactured ammo kaboom." It's always remanufactured ammo...always... ^This. Your title is misleading and it unfairly implicates Mag Tactical. The barrel extension is steel and it blew apart too. I don't think it was a problem with you upper receiver. I haven't seen an aluminum upper KB like that before though - seems like the magnesium is more brittle. |
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Yes, it is very brittle.
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I haven't seen an aluminum upper KB like that before though - seems like the magnesium is more brittle. Quoted:
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Misleading thread title is misleading. Should be "another remanufactured ammo kaboom." It's always remanufactured ammo...always... ^This. Your title is misleading and it unfairly implicates Mag Tactical. The barrel extension is steel and it blew apart too. I don't think it was a problem with you upper receiver. I haven't seen an aluminum upper KB like that before though - seems like the magnesium is more brittle. |
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OP, If you send me all those blown up parts, I will send you a BALIOS-lite receiver set to replace them. Quoted:
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http://i40.photobucket.com/albums/e206/docxylo/image_zpsc4fbb66c.jpeg OP, If you send me all those blown up parts, I will send you a BALIOS-lite receiver set to replace them. Are you serious? |
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Are you serious? Quoted:
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http://i40.photobucket.com/albums/e206/docxylo/image_zpsc4fbb66c.jpeg OP, If you send me all those blown up parts, I will send you a BALIOS-lite receiver set to replace them. Are you serious? Well yeah...... 
I want those blown up parts though... if it's serviceable, you can keep it. If it's junked, I would like to have it. |
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Well yeah......
I want those blown up parts though... if it's serviceable, you can keep it. If it's junked, I would like to have it. Quoted:
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http://i40.photobucket.com/albums/e206/docxylo/image_zpsc4fbb66c.jpeg OP, If you send me all those blown up parts, I will send you a BALIOS-lite receiver set to replace them. Are you serious? Well yeah......
I want those blown up parts though... if it's serviceable, you can keep it. If it's junked, I would like to have it. I'll find out if MBI will want to inspect the barrel/bolt since they have the parts of the casing stuck in them. If they dont do right I'll contact you, Thanks for the offer! |
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I'll find out if MBI will want to inspect the barrel/bolt since they have the parts of the casing stuck in them. If they dont do right I'll contact you, Thanks for the offer! Quoted:
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http://i40.photobucket.com/albums/e206/docxylo/image_zpsc4fbb66c.jpeg OP, If you send me all those blown up parts, I will send you a BALIOS-lite receiver set to replace them. Are you serious? Well yeah......
I want those blown up parts though... if it's serviceable, you can keep it. If it's junked, I would like to have it. I'll find out if MBI will want to inspect the barrel/bolt since they have the parts of the casing stuck in them. If they dont do right I'll contact you, Thanks for the offer! Let me know, you can contact me when you find out at [email protected] |
[ARCHIVED THREAD] - KABOOM (Page 1 of 5)
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