Urban prone and ftf

Runningfool

Runningfool

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I was practicing shooting my AR from an urban prone position for the first time today and had a couple failure to feeds. These were not hard jams, occurred 2/20 rounds, and only happened when I was lying on my left side (ejection port up). Is this common? Anything I can do to prevent it? Blame it on the cold weather?
 
This may have very little merit on your AR issue, but I always wondered how My Swiss Arms would work when shooting on it's side, ejection port facing down, with only a few inches or less between the handle and the ground. Like when I do a 9-hole drill, my bolt handle is almost touching the ground sometimes and I have yet to have a malfunction in this position, not sure why the AR would be any different in this case, I don't know why you have any issues with the ejection window up though, that's strange:confused: I would not blame it on the weather.
 
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Only time I've had issues like that with the AR was when the casing bounced off the wall/ground/sea can back into the ejection port, I'm stumped on why shooting with the ejection port up would induce a malfunction. Maybe your extractor spring is weak and it's not fully overcoming gravity? It's kind of hard to say without some more information.
 
easysauce said:
were the primers dimpled? im a bit confused if you had Fail to fire, or a jam (fail to eject)
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Spent case ejected fine but the round that was picked up jammed. I didn't pay too much attention to how it was jammed, it only occurred twice and both times I just dropped the mag, pulled the charging handle and the jammed round fell out of the mag well (body of the case was a little dinged up).

It was a little peculiar so just thought I would see if anyone had any insight on why or how. I have a BAD lever installed and it could be that since I was holding my rifle a little different while lying on my side, maybe pressure on the lever was engaging my bolt catch a bit? I dunno.
 
*MALICE* said:
Hard to diagnose without seeing it in action.

Doubt it's ammo related.

What kind of mags?
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Yeah, I really should have examined the jam before just clearing it, might have given some clues. Next time out I will see if it happens again and pay closer attention. If the zombies come between now and then I'll just have to remember to only lie on my left side ;)

5/30 pmags fwiw.
 
Yeah. I got burned by an LAR mag during a service rifle match this past august while shooting modified prone. Definitely not ammo related.

I'm guessing LAR.
 
Based on experience, I tend to blame BAD levers for a lot of failure to feeds.

They can often create drag on the bolt carrier to slow it down enough that it does not have enough ass to chamber a round.

Try it without the BAD lever.
 
Runningfool said:
Spent case ejected fine but the round that was picked up jammed. I didn't pay too much attention to how it was jammed, it only occurred twice and both times I just dropped the mag, pulled the charging handle and the jammed round fell out of the mag well (body of the case was a little dinged up).

It was a little peculiar so just thought I would see if anyone had any insight on why or how. I have a BAD lever installed and it could be that since I was holding my rifle a little different while lying on my side, maybe pressure on the lever was engaging my bolt catch a bit? I dunno.
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I have to agree with the BAD lever bit then. You posted pmags at the same time as I wrote my reply.

When we do modified prone in service only our shoulder is allowed to touch the ground. I have to wonder if this could just be an issue where maybe a finger or glove or something was touching/riding the BAD lever?

Or maybe just he lever itself? I don't have one installed, and I definitely blame LAR's for my issues.
 
KevinB said:
Based on experience, I tend to blame BAD levers for a lot of failure to feeds.

They can often create drag on the bolt carrier to slow it down enough that it does not have enough ass to chamber a round.

Try it without the BAD lever.
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Yea, YMMV with these things, but I found my AR ran fine about 80% of the time when I had a BAD Lever installed. However, it was only causing me grief with the bolt not locking back after the last round. Took it off, and now my AR runs fine... definitely start there.
 
Not a bad lever issue but infact a magazine issue ralated to the oriantation of the said rifle, recoil of said rifle and with the type of rounds that were being used made it a perfect storm. Clean up your rig and lube her up good and get some new mag's preferably with "enhanced followers" to resolve this issue. Also for running matches try not to use the black box AE but I know its cheap and it works fine for plinking.
 
Clean up your rig and lube her up good and get some new mag's preferably with "enhanced followers" to resolve this issue.
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Do Magpul PMags not have Magpul 'enhanced followers' in them already?
 
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