Here is an example of why to build with quality parts.

[drift_g35]

Pretty surprised there wasn't more damage. This guy is quite lucky I would say.


https://www.youtube.com/watch?v=1801xEOyRT4

[Musashi]

That is one lucky dude that has no face shrapnel thanks to spending the cash and buying good gear.
I'll stick with my BCM and DD parts thank you very much

[BPTactical]

Kaboom!
Dealt with a FrankenAR a while back that did the same, about the only thing I felt comfortable telling the owner was salvageable was the buttstock.
Had been shooting reloads he had purchased from the Tanner GS.
But it was a good illustration compared to this occurrence, billet vs forged lower.
The billet lower was distorted very badly in the magwell whereas the lower on the one I dealt with(Spikes) was barely bulged.
Imagine what could have happened if that nice big chunk on that billet had detached.

[Jim B]

Most powders I use to reload .223 just about fill up the case. Seems kind of hard to believe the cartridge could be overcharged by so much. [Dunno][Dunno]

[Jamnanc]

Not sure the overcharged case makes sense to me. Seems like maybe it fired out of battery. Why would the clicks happen on an overcharged case?

[Hound]

Not sure the overcharged case makes sense to me. Seems like maybe it fired out of battery. Why would the clicks happen on an overcharged case?

This is more in line with my thinking.

[spleify]

I aint buy it. Unless it was the WRONG powder I cant imagine it was over charged in a .223 case. OOB is my opinion.

If you look at the case at 2:10 of the vid you can see the extrusion marks on it where it appears to me that the round was fired OOB.

In any case glad the shooter is ok and no injuries were incurred. Scary stuff.

[ChadAmberg]

"I ran out of Varget, so I tried the same amount of HP-38..."

[MarkCO]

Sure looks like a round that went into the chamber and deep seated due to insufficient case neck tension. Having worked for several manufacturers as an expert, and having blown up over a dozen ARs (on purpose), the damage is pretty typical for that failure mode. Less typical of a squib, but possible. That kind of failure really can only occur with ONE cartridge and bullet using pistol powder unless you deep seat a bullet with the ogive inside of the neck. Forged lowers typically fare just as well as billet and there is no evidence of anything wrong except ammo. Realize, if the owner insists on "fatigue" then he is done as far as pursuing the ammo manufacturer. Gots to be careful with videos...

[newracer]

Seems to me like it was:
1. Round didn't feed, click on empty chamber
2. Again round didn't feed, click on empty chamber
3. Round feed but did not fully seat, BOOM!

[kidicarus13]

I wonder how many times that brass had been reloaded hot previously? It's more about quality factory ammo than quality AR parts IMHO.

[brutal]

Would OOB cause the extreme overpressure indicators on the case head?

Wouldn't there be a squib in the case of OOB?

MarkCo's post makes sense to me.

Billet does not make sense to me. I'll stick with forged thank you very much.

[MarkCO]

Would OOB cause the extreme overpressure indicators on the case head?

Wouldn't there be a squib in the case of OOB?

First question, NO WAY! Even more so the fracturing of the carrier says it was not an OOB.

Second question, maybe.

[funkymonkey1111]

i think the gun thought that guy was going to eat it and just gave up the ghost

[Jer]

Curios what the results would have been w/a Gen 2 lower with a flared magell. The standard magwell allowed the lower to bend laterally along the top and bottom edges but a flared magwell adds triangular rigidity to that bottom edge, quite a bit too at that, so I'm curious what happens if the energy isn't absorbed through distortion like that. Perhaps just more energy escaping downwards. Added energy could have caused the lower to actually fracture causing more of an 'explosion' at the magwell. Hard to say. I do agree w/Mark's assessment though.