LMT MWS rifle failure to eject causes?

[problemchild]

I got my rifle back from the factory for a failure to eject issue and they said the cause was the gas hole in the barrel being too large. The larger hole was causing the bcg to fly back at excessive speeds and that caused the brass to ricochet around in the ejection area. The bcg/extractor would lose control over the brass and it would lead to a stove pipe.

So my barrel was replaced and I even upgraded to a SS barrel for an additional fee. I take my rifle to the range and all is good. in fact all is great as the new barrel shoots awesome little groups. I fired aprox 100 at the 1st range outing. I fired aprox 100 at the 2nd range outing. Then I go to the desert and I fire aprox 30 and the gun jams. I got the exact same stove pipe failure to eject that I got before.

One last thing and I think this is a clue. While firing from a fold out table in the desert most of my brass would land 3 feet right and 4 feet ahead. About 1-2 out of 10 rounds would land next to my rifle on the table. Almost like they just fell out of the ejection port instead of being flung out. From past guns I have owned I know that a good running gun will land the brass in the same spot all together.

My questions are these:

Would the old bolt need to break in to the new barrel extension (over 200 rounds)?

What other causes lead to a failure to eject?

What should I try before I send it off to LMT again?

LMT will not sell me a spare bolt, extractor or any spare parts for the gun as they say the parts are not available.

I keep the gun very clean and well oiled.

Im using hand loads but it will do it on brand new FGMM, Hornady match.

My hand load consists of 46g bcl2 and 147g LC projectiles this time. Last time it was the same powder but 155smk one with LC brass and one with FGMM brass.

 

[Unknown]

Re: AR-10 type rifle failure to eject causes?

An interesting cause I found for failure to eject on one of my rifles was a too powerful extractor spring.

The extra power on the extractor actually forced the base of cartridge into the opposite side of the bolt so powerfully, that the ejector couldn't push the cartridge base off the inside of the bolt in time for it to go out the ejection port before the bolt began moving forward again.

As soon as I reduced the power on the ejector spring, ejection worked just like it was supposed to.

 

[problemchild]

Re: AR-10 type rifle failure to eject causes?

LMT wont sell me spare parts and KAC wont sell to CA residents. I guess I could try to track down a reseller on the Internet.

Anything else I can look for?

 

[jakhamr81]

Re: AR-10 type rifle failure to eject causes?

I'm sorry about your problems. I too had problems with an LMT MRP. Their is no break in period for a bolt/ barrel extension; it either fits or it doesn't. The head space should have been checked by LMT before they shipped it back to you. I personally would not be able to trust that rifle platform and would send it back to LMT, have them fix it again, and then sell it. Your best case scenario would be for them to give you a whole new upper, but having dealt with them myself, that I think that will be very unlikely.

 

[problemchild]

Re: AR-10 type rifle failure to eject causes?

Im not going to give up yet. Many people have these guns and they work fine. The military is using them as well. I doubt they won the contract by failing to cycle.

 

[jakhamr81]

Re: AR-10 type rifle failure to eject causes?

Obviously, they are fine weapon systems or they would not still be selling them. I am referring to your specific platform. You have a major problem with your weapon, one that LMT has failed to identify and repair. IMHO, LMT should now at the very least, replace your upper with a fully functioning, malfunction free upper... It is the right thing for a manufacturer to do. I myself cannot trust a firearm that has let me down. If I ID a major problem, or one that cannot be diagnosed and repaired, I get rid of it. Like I said though, that is just me and I do not expect everyone to act as I do.

I would keep hounding LMT, you may have better luck with them than I did. I know that they make quality parts and firearms. I just had a bad experience with their customer service when one of their uppers failed me and they tried to play stupid and put the blame on me for changing out the grip and adding a Magpul BAD lever. That is another reason that I would not recommend trying to solve the problem yourself, because if you are unsuccessful, LMT will sure say it is your fault for changing out parts.

Anyways, good luck

 

[PSL1078]

Re: AR-10 type rifle failure to eject causes?

My comment doesn't exactly contribute to this thread, but I am glad other people have had problems with LMT. I know they are a great company, but they ship off problem parts just like the rest of them. I have had a receiver milled wrong that sat about 1/8" too far to one side of the lower. Had RRA screw up 10 of our LAR8 and 25 LAR15 rifles. Seems most on here rave about LMT, Colt, and RRA and bash the other companies when they have problems.

 

[jakhamr81]

Re: AR-10 type rifle failure to eject causes?

Any company can make mistakes. It's how they correct those mistakes that really counts. IMO, when a company says that the customer putting a new grip and a BAD lever on an otherwise completely stock LMT gun, is the reason why a gun is not properly cycling, I am not only insulted, but I am also appalled at the ignorance of said company. After such a display of incompetence, I decided to give up on LMT and sold the problem upper. So what if I will never buy another LMT product, they still got away with not having to correct a problem with one of their products by simply playing stupid.

Problemchild, I hope that your perseverance is stronger than mine and you force LMT to make your gun right. Like I said earlier, they do make some good stuff but it sounds like you just ended up with a lemon. A big company like LMT needs to live up to the reputation they have been given.

 

[frank crawley]

Re: AR-10 type rifle failure to eject causes?

the very early LMT's came with KAC bolts and carriers. I assume that the rest of them are exact copies of KAC's bolts. If I was in Cali. I would contact operation parts or King Optics and get an SR25 bolt repair kit. It contains a new extractor, ejector, all springs and pins needed for both as well as a firing pin, gas rings and I believe an extra cam pin. That way you can change what is needed and possibly have some spares. i hope this helps. I know it sucks but I do have faith that LMT will fix the issue if you can track it down or if you want to send it back for a second time.

 

[problemchild]

Re: AR-10 type rifle failure to eject causes?

Back to the FTJ issue...........

Here is a video of me shooting the rifle that day. On round count 4 you will see the brass bounce on the table and roll off. It barely makes it out the ejection port. Then the next round flies to the right not right/forward like the 3 before that.

http://www.youtube.com/watch?v=qQVQ18jeNcM

 

[Postal0311]

Re: AR-10 type rifle failure to eject causes?

Have you tried checking the extractor claw for burrs? Checked to see that the ejector spring is in good condition.

Would you also please consider changing the topic of your post so no one mistakes this for a problem with an Armalite AR10 rifle.

 

[problemchild]

Re: AR-10 type rifle failure to eject causes?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Postal0311</div><div class="ubbcode-body">Have you tried checking the extractor claw for burrs? Checked to see that the ejector spring is in good condition.

Would you also please consider changing the topic of your post so no one mistakes this for a problem with an Armalite AR10 rifle. </div></div>

I looked at the extractor and it looks OK but I am no expert. The whole gun was at the factory for this issue so wouldn't they do that?

 

[LRS_Ranger]

Re: AR-10 type rifle failure to eject causes?

I had a similar issue, I cut a coil off the extractor spring and polished the extractor claw and the problems went away...

 

[problemchild]

Re: AR-10 type rifle failure to eject causes?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LRS_Ranger</div><div class="ubbcode-body">I had a similar issue, I cut a coil off the extractor spring and polished the extractor claw and the problems went away... </div></div>

Was your brass landing all over the place or in one neat pile? My brass is going all over. My AR15 puts it all in the same place and is very consistent.

 

[Postal0311]

Re: AR-10 type rifle failure to eject causes?

Thanks for changing the topic title.

I just remember something, IIRC someone on ARFCOM said they had an issue with the Ejector binding on their MWS BCG.

Try holding the bolt and looking at the ejector plunger on the bolt face. I think mine was brass colored on the MWS I got rid of. Use something like an empty shell or some other tool to depress it and make sure that it moves freely.

The MWS is an awesome gun, when it works correctly. Hopefully you can get yours sorted out.

 

[Oakland Tactical]

Re: AR-10 type rifle failure to eject causes?

Does your ejector have a chamfer on it? Have you taken the bolt out of the rifle and put in a spent case to see how much ejector spring tension there is? You can also see how far it throws the brass or if the ejector is sticky.

My ejector is very stout, you cant press it in with your finger. I would start by taking your bolt apart to see if the spring is broke, or has contaminates in it. Seems like with inconsistant piles that its either that or it sometimes hits the port on the way out.

 

[problemchild]

Re: AR-10 type rifle failure to eject causes?

Yes I did all that. I took it apart and cleaned it. It is very stout and you cannot press with fingers. Its clean and moves freely. It is not sticky.


<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Re25</div><div class="ubbcode-body">Does your ejector have a chamfer on it? Have you taken the bolt out of the rifle and put in a spent case to see how much ejector spring tension there is? You can also see how far it throws the brass or if the ejector is sticky.

My ejector is very stout, you cant press it in with your finger. I would start by taking your bolt apart to see if the spring is broke, or has contaminates in it. Seems like with inconsistant piles that its either that or it sometimes hits the port on the way out. </div></div>

 

[terrygood]

Re: AR-10 type rifle failure to eject causes?

Problemchild you have a sweet set up in the video. How many rds have you run through the rifle? There are so many points of contact in the action. Give it some time and shoot the rifle. The rifle will loosen up. If it happened every round then I would worry. I would not modify anything. You have a new rifle.

 

[RG in Idaho]

Re: AR-10 type rifle failure to eject causes?

Problemchild,

Check your PM's.

 

[Tactical Support]

Re: AR-10 type rifle failure to eject causes?

Have to ask have you tried using more oil in the bolt? Had a customer with the same issue and it all went away after using EWL from Slip 2000, we also used FP10 and M Pro 7 saturating the bolt with oil was all it needed.

 

[RSR]

Re: AR-10 type rifle failure to eject causes?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Tactical Support</div><div class="ubbcode-body">Have to ask have you tried using more oil in the bolt? Had a customer with the same issue and it all went away after using EWL from Slip 2000, we also used FP10 and M Pro 7 saturating the bolt with oil was all it needed.


</div></div>

+1 on saturating the bolt and that was my first thought . I've seen it too many times guys actually not lubing the bolt/ carrier or barely applying a drop or two. A gas gun is not a bolt gun. Same reason you have oil in your car engine. Metal on metal will seize things up.

 

[problemchild]

Re: AR-10 type rifle failure to eject causes?

Yeah I keep the bolt/bc wet with slip 2000 (great oil). The oil sticks on like glue and never comes off. I have about 800 rounds though the gun so it should be broken in. The barrel is new with about 350 rounds now.

I sent Gene at LMT the videos and an email explaining what is happening. What concerns me the most is the brass placement. Its all over the place and not consistent.