Ar-15 Kaboom.

Griffoneur said:
Or maybe them bullits wuz reloaded with a magnum handgun powder. They look like reloads to me.
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The OP on ARFCOM says "local manufacturer", so I assume commercial re-manufactured ammo. Given that, I would doubt that there would be one case in the middle of a lot filled with magnum powder. If it was not a squib/blocked barrel, it could have been a half filled case where the powder detonated. But given the events as described in the post, I would assume a squib is more likely.

MasterMC - if there was a squib in the barrel, it can be pushed out of the barrel while still causing a large enough pressure spike to be dangerous.
 
Jacks_username said:
MasterMC - if there was a squib in the barrel, it can be pushed out of the barrel while still causing a large enough pressure spike to be dangerous.
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So the bullet was pushed out but too late to vent the pressure wave front that took apart the rifle at the chamber. I suppose that makes sense.
 
I wouldn't rule out the load firing out of battery. I am not certain as to where this occurred (I think an Ontario police service) a Colt Canada (Originally Diemaco) C8 fire out of battery and it blew apart the receiver and the magazine (because they are made of composite material and not metal.) The handler got a nasty injury because he had a habit of holding the front of magazine with his support hand.
 
DarkHorse9825 said:
I wouldn't rule out the load firing out of battery. I am not certain as to where this occurred (I think an Ontario police service) a Colt Canada (Originally Diemaco) C8 fire out of battery and it blew apart the receiver and the magazine (because they are made of composite material and not metal.) The handler got a nasty injury because he had a habit of holding the front of magazine with his support hand.
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I hold the front of the magazine/well.
It feels better that way instead of holding the hand guard.
 
Looks like out of battery to me too. Look at the amount of brass left on the bolt, damage to the carrier etc.

High primer seating maybe?
 
http://www.m4carbine.net/showpost.php?p=358709&postcount=99

For everyone that keeps say OOB; This guy put his money where is mouth was got his hands on a cutaway AR15. Just to demonstrate how an OOB is impossible.

Long story short, bolt's still locked when the carrier's retracted even by a bit. If the carrier isn't all the way home, the firing pin cannot physically reach the primer.The only way for OOB to occur is if there is debris on the bolt face hard and large enough to set off the primer or some part is grossly out of specification or if the primer was seated so high that the bolt face set it off somehow.

Face it, it's either a squib or an overcharge, but either way it was an AMMUNITION failure.
 
Hot gas venting back out the base of the cartridge as this was the weakest part of the equation is most likely a squib, and if they carefully inspect the barrel, there is quite likely a buldged (even if just slightly) barrel too.

It is extremely unlikely this is out of battery, although the fired round could have started unlocking the bolt too at point of failure - depending on where the blockage was (think forward of the gas block)....
 
WOW he looked at the chamber only/ usually when nothing happens 3 things come into my mind 1st the mag didn’t feed properly 2nd BAD primer 3rd no powder. This one was # 3. No powder but the primer discharge had enough force to push the bullet into the barrel but not enough to push it out of the barrel
When he was shooting this time he fired a round and went to shoot again but nothing happened, he pulled the mag out and pulled the bolt to the rear and a spent shell case came out. He looked into the chamber and didn’t see anything so he reinstalled the mag then chambered the next round and pulled the trigger.
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The barrel can handle enough pressure (Their made out of steel) but not the receivers (their made out of aluminum). The only way out (55,000 psi) was backwards= (the bolt, stock and the receiver). It clearly shows it in the picture. Amazed that nothing happened to the shooter.
1895GS said:
I don't understand.
If it was a squib load the the bullet was lodged in the barrel, why did the barrel not self-disassemble?
Looks like the round fired out of battery.
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I'd guess squib (because he didn't rule it out) BUT it could be caused by insufficient/no crimp - bullet wedges on the ramp, forcing the bullet back into the case as it chambers. Pressure spikes can be out of this world when that happens.
 
mlehtovaara said:
Had to have been an obstructed barrel! That is a serious explosion right there! Then again it is a Bushwhacker!
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You should read the information posted with the photos. The shooter describes what amounts to a squib.

If the rifle was of lesser quality, than what that person was holding, the shooter may not have been so lucky.
 
AR cannot fire out of battery by design.

It is possible that the catridge has too little charge - a manufacturer's error.
 
Maybe a couple of small parts salvageable, but the rifle is pretty much a write-off.

Always pay attention to handloads and make sure the barrel is unobstructed. This could have been much worse.
 
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