NEA BCG Failure to eject.... anyone else have this problem or have a solution

garbal

garbal

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Recently installed an NEA FA BCG in my AR... Darn thing won't eject, it extracts... but won't spit the spent case out...

Took apart, cleaned, etc... still nothing... others work fine in the rifle so it's not spring / gas problems...

Anyone else have problems with NEA BCG's doing this or have a suggestion for a fix?

Thanks for your help!

Garbal.
 
NEA junk...every NEA I've seen has had problems, including a PDW with less than 1000 rounds with a cracked bolt. Avoid like the plague...my suggestion is to order a DD bolt.
 
garbal said:
Recently installed an NEA FA BCG in my AR... Darn thing won't eject, it extracts... but won't spit the spent case out...

Took apart, cleaned, etc... still nothing... others work fine in the rifle so it's not spring / gas problems...

Anyone else have problems with NEA BCG's doing this or have a suggestion for a fix?

Thanks for your help!

Garbal.
Click to expand...

Is the ejector plunger installed? Can you push it in and have it push back against spring pressure?
 
I owned an NEA-15 7.5" PDW
-I replaced the bolt to a Daniel Defence
-kept the NEA FA Bolt Carrier

Don't bother getting it replaced by NEA...invest on Daniel Defence
 
First check that the ejector moves freely and doesn't stick. Next, see if you can move the extractor outwards by hand....sometimes the rubber bumper in the extractor spring is way to hard or long. You can either remove it, or trim it back a bit.
NEA doesn't make the BCG BTW, not sure who does. The one I had just had an "E" on both the bolt and BC. My NEA bolt blew up after 3 rounds through.....lol so I take all the "MPI and Proof Tested" as a load.
 
FEJ is almost always caused by the bolt, ejector or the spring.

If the ejector hole was not de-burred correctly it may bind the ejector, or it may scrape of brass from the case which gets caught up in the hole.

If the spring was not compressed far enough on assembly it may be bent or damaged by the ejector pin and binding.

You can push on the ejector with a spent case. Try putting a drop of oil around the ejector and working it up and down.

If that does not work, either send the bolt back for warranty or replace the ejector, pin and spring and check the hole for burrs.
 
Did you take apart the BCG and reassembled it? As mentioned above, check and see if the plunger moves freely and not binding. If that works, check and see if the bolt is installed in the correct orientation ie extractor arm is on the outside nearest the ejection port as in the pic below?

0101300020-2.jpg
 
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Just a question, is it assembled correctly? If the bolt is installed in the carrier 180 degrees out the ejector will eject inwards. It's a long shot but could be the problem
 
Throttle_monkey1 said:
Just a question, is it assembled correctly? If the bolt is installed in the carrier 180 degrees out the ejector will eject inwards. It's a long shot but could be the problem
Click to expand...

I have attempted to see if this is possible before and the hole in the bolt for the cam pin appears to be moderately tapered so that you can only insert it from one side, forcing you to align the bolt correctly in the bolt carrier.
 
I tried it on an older bolt & carrier with a high round count and was able to assemble it incorrectly. Like I said its a long shot, but if there's a way to do something incorrectly, someone somewhere has managed to do it.
 
Is there positive grip on the rim of the case? Does your extractor spring have an o-ring? all my Bolts have this:
http://www bravocompanyusa com/BCM-Extractor-Spring-Uprade-Kit-p/bcm%20extractor%20spring%20upgrade.htm
I'm pretty sure one of the BCM dealers can get this.
 
If it's the BCG for sure, don't spend any money on it. Contact NEA and they'll replace it quickly. Might as well take full use of your lifetime warranty. They were very quick to reply back to me when I thought I had a defective barrel. :)
 
Funny that everyone says to ditch it and buy a DD. I had a NEA BCG for 1 day. Opened the package and stripped it apart and after cleaning lubing and inspecting it, promptly put it back in the box and sent it back. Staking was poor and the gas ring seals were not right. The bolt was binding everytime I tried to move it back and forth and it took some effort to move it. When I compared it to my nickel boron BCG the bolt moved back and forth like silk. No amount of lube made any difference. So I ordered the DD from Wolverine. Showed up today, but I have not had a chance yet to pull it apart and clean/lube/inspect it.

Now to be fair to NEA this is the first thing I have bought from them that I was not happy with. Everything else I have was good value for my money.
 
The bolt isn't supposed to move freely. If it does your gas rings are worn. A simple test is to stand the BCG up on a table. There should be enough resistance to hold the weight of the bolt carrier.

Just replaced the gas rings on a norc I picked up from the EE. Gas rings are cheap. Like 3.00 for a set.
 
Throttle_monkey1 said:
The bolt isn't supposed to move freely. If it does your gas rings are worn. A simple test is to stand the BCG up on a table. There should be enough resistance to hold the weight of the bolt carrier.
Just replaced the gas rings on a norc I picked up from the EE. Gas rings are cheap. Like 3.00 for a set.
Click to expand...

If the OP was suffering from short stroking, it could possibly be worn gas rings since by the sounds of things, the rifle works fine with another BCG.

We'll need more info from the OP ie new or old BCG and if he's checked the above suggestions.
 
The bolt was very rough moving back and forth. You could feel the rings binding on the inside and you had to force the bolt back and forth. You still need some force to move my spikes nickel boron, but comparatively speaking it's smooth as silk.
 
Trinimon said:
If the OP was suffering from short stroking, it could possibly be worn gas rings since by the sounds of things, the rifle works fine with another BCG.

We'll need more info from the OP ie new or old BCG and if he's checked the above suggestions.
Click to expand...

Sorry, I was replying to jawsman. I should have quoted his post.
 
OP: What is the failure frequency? Does it fail to eject everytime? Are you getting double feeds (i.e. it isn't ejecting the spent round but is feeding the next round in the mag)?

Also, if you take the BCG out of the rifle and put an empty case against the bolt face, does the ejector push it away? With the extractor grabbing the case rim, do you have to compress the ejector spring to get the case to sit flush on the bolt face? Kind of hard to explain what I'm saying, but I would play with it to see how strong the ejector spring is. If you have the punches you could upgrade the ejector and extractor springs to some from a reputable manufacturer.

More info would be great. I love troubleshooting AR's when they aren't mine haha...

Ben
 
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