Yeah, or a light strike from the spent case, perhaps? I don't see any logical way for the one in the chamber to be spent, too, but....
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Yeah, or a light strike from the spent case, perhaps? I don't see any logical way for the one in the chamber to be spent, too, but....
Contractor scum, AAV
I don't see how this situation can even happen. The BCG would have to stroke back the additional length of the spent casing,without ejecting it, in order for the spent casing to push the next round into the chamber. Obviously something is going terribly wrong here. I just have a hard time wrapping my brain around what it could possibly be. Unless the BCG failed to extract the chambered round, then slammed the next round into the still chambered round hard enough to ram the bullet of the next round down the neck of the case. Aside from that scenario I have no way to explain what I see in this picture. Someone please help me understand what I am seeing here.
Vince
When injustice becomes law, rebellion becomes duty. Thomas Jefferson
I'm with EW.
I don't see how this can occur during the cycle of operation.
Even with the extractor compressed and stuck in place. During the chambering cycle, the spent shell casing would be forced upward and jammed into the barrel extention. The live round would not be able to chamber and forced down hitting the lower portion of the barrel extention. This is what most people refer to as a double feed.
In my feeble mind, I can't phathom how this could possibly happen.
If someone figures this one out please let me know how it was done.
In the sport of combat, there is no second place.
It looks as if the primer on the chambered round has been struck.
The case inline with the chambered looks as if its been fired and is empty.
Even if the chambered round is live, and empty round being lodged behind a fully chambered round is not plausible. I have seen empty cases become lodged over the gas tube and partly feed the next round, but this?
Does not seem to be mechanically possible.
I decided this due to the fact that even if the spent case was extracted from the chamber, but was not ejected from the weapon, how would the bolt strip a new round? Unless, the spent case was pitching at a downward angle as the action cycled? However, that is not possible as the BCG will not travel rearward enough for this to happen.
Only possible scenario would be as EW1066/Vince said, the "spent case" was not a spent case. The bullet was pushed back into the cartridge... Which would explain the appearance of a primer strike on the chambered round. But, I believe there would have to be quite a bit of force excreted on the cartridge to set the bullet back that far.
So I did a little test.
I took a spent case and lightly crimped a 55gr bullet in an unsized case. I loaded that case at the top of a full mag. I locked the bolt back and inserted a spent case in the chamber. Then, the magazine with the lightly crimped bullet was inserted into the firearm. I then proceeded to close the bolt using the bolt release. The bullet set back into the body of the cartridge, wedging against the chambered round and between the right lower bolt lug (looking at the weapon from the rear). The case that was stripped and lodged in the action just clears the feed lips on the magazine. So, with all of the forces going on in the weapon during live fire, it is possible that the case would have jumped up and become level if there was some sort of bounce when the action came to a screeching halt. This could be what happened.
Food for thought.
OP - More info needed..
Was the case in the chamber fired, The case that was wedged a live round? Empty? Pushed in bullet?
Last edited by 556mp; 08-02-10 at 23:09.
I have seen some crazy AR shit. Primers that blew and flew into the opening of the carrier key as well as spent cases that bounced back into the upper and were completely turned around.
The second incident happened when the spent case bounced off a barrier and went back inside the upper.
I am willing to bet that in addition to his ejector or buffer being out of whack, the chamber is probably tight as well.
Owner/Instructor at Semper Paratus Arms
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Was the case in the chamber fired? NO
The case that was wedged a live round? EMPTY
I JUST INSTALLED NEW EXTRACTOR + EJECTOR WITH NEW SPRINGS AND BLACK DONUT ON EXTRACTOR, GOING TO THE RANGE THIS WEEKEND TO TEST FIRE, WILL GIVE YOU A REPORT WHEN I GET BACK
THANK YOU VERY MUCH FOR ALL INPUT AND ADVISE, APPRECIATED IT.
Last edited by glockstan; 08-03-10 at 00:36.
Owner/Instructor at Semper Paratus Arms
Facebook: https://www.facebook.com/SemperParatusArms/
Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/
M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141
Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
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