Has anyone ever seen this?
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Old 06-06-2013, 12:46 AM   #1
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Default Has anyone ever seen this?

New Colt SOCOM, second 30 round mag. (which was a Colt factory mag), third round in, then this. Haven't had a chance to fire it after the jam. No visible damage. What kind of issues could I expect? Any ideas how the round got jammed ABOVE the bolt?!img_0492.jpg Any help is appreciated.

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Old 06-06-2013, 01:45 AM   #2
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Yup. Do a search for "AR jam live round above bolt" Hold gun vertical with muzzle pointed away from body,
pull down on charging handle with one hand while holding forearm in other hand and SMACKING butt on the
ground. Don't be gentle----a few good whacks will clear it. More than one theory WHY it happens.

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Old 06-06-2013, 04:13 AM   #3
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You have a bolt override.

Use chop sticks. You won't damage your rifle and it works just as well as any of the other methods for clearing it. Mortaring your rifle may be just fine for combat, but it's not an emergency so clear it using a little finesse.

Pull back on the bolt lightly, just enough to remove tension from the pressure that the spring exerts on the bolt carrier, and use the chop stick to pry the round out.

There are a variety of causes, but mark your magazines and if it happens again make notes. If it happens with more than one magazine, have a gunsmith look at the carbine.

Make sure your gas tube has not been damaged or bent out of alignment with the gas key before firing it.

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Old 06-06-2013, 04:28 AM   #4
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Do drop the mag before clearing it by any method.

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Old 06-06-2013, 05:23 AM   #5
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Its most likely the Mag lips are too far appart or angled wrong and the round popped up and out on its own as opposed to being pushed out by the bolt, try a different mag.

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Old 06-06-2013, 05:38 AM   #6
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Also a weak mag spring can cause this.

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Old 06-06-2013, 05:50 AM   #7
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So here's the deal, when you pull the mag, make a note of which side the top round is on, then reload and try again, if you have another problem when you drop the mag check and see which side the top round is on if it the same side, then liekly you hae a bad mag lip, if the problem happens on either sides or seeminly random its the spring.

You can tension the spring by just popping it out af the mag and stretching it a little.

When you fire the gun, the recoil trys to drive the rounds in the magazine down. When the spring is weak, the rounds move down and then "pop" back up as the bolt is wide open, sometimes the top round slips past the lips and jams like you see.

Newtonian forces are a trip!!!!

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Old 06-06-2013, 09:22 PM   #8
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Thanks to all for the posts. Very helpful. We used curved pliers up through the mag-well, pulled the bullet from the casing, then pried it out. Was left with a few marks on the mag-well, not bad. The Colt factory mags I have are junk, more like the springs are junk and the consensus was that was the issue, but will check the gas tube. The first mag I ran through it was steel made by ASC... very smooth springs and inexpensive! Anyway, thanks again.

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Old 06-07-2013, 03:03 AM   #9
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Not that it matters now, but for future reference wood and plastic (like chop sticks) won't remove the anodizing from the receiver of your AR.

In the future, use PMAG's. MagPul magazines generally have fewer problems than aluminum and steel magazines.

Also, as other posters have mentioned, magazine springs for government contract magazines, and most commercial magazines for that matter, are generally stainless steel or a coated carbon steel. You won't find many carbon steel or stainless steel springs inside the engine of a modern car and with good reason- it's less than stellar quality material for the application. For reasons best left to an explanation from a metallurgist, chrome silicon springs generally work better and last longer.

If you are intent on using aluminum or steel magazines, I'd look into buying better springs. You shouldn't have to mess with a spring to get it to function properly.

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Old 06-15-2013, 08:24 PM   #10
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Measure the feed lips and compare to a "good" mag. May be a body intended for 6.8 SPC or 6.5 Creedmoor. Check the spacing between the feed lips to insure they are parallel.

There is absolutely nothing wrong with metal mags. I ONLY own GI spec aluminum mags. Upgrade to a better spring. Check Specialized Armament Warehouse. Their enhanced springs are "da bomb". You will NEVER have to replace one again.

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