Posted: 5/9/2009 1:20:10 PM EDT
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Hi guys. I posted this over at the troubleshooting section and nobody replied. So I figured I would try here.
I have a new to me AR. I ran about 50 rounds through it and took it apart to clean it. just removed the bolt carrier, so i could run some swabs down the barrel. I put it back together and now it will not eject or partially eject to spent round. When I manually cycle the action it works fine. 60 peopole have looked at it over in troubleshooting and no replies, I know michigan has some answers. Thanks guys. |
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did you take apart your bolt? is everything back in the right spot? Thats what I was thinking. How about the ammo you are shooting? Is it real dirty? Did you lube the carrier real heavy with oil or grease? Possible clogged gas port? +1 Check the gas port.... |
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Quoted: Maybe a gas system issue. Gas key aligned properly? Gas tube pinned to gas block? ( Met a fellow at a range a few weeks back that had a "smith" add a new railed gas block, and the fellow had not pinned the gas tube. Guess what was the result? Yup', FTE. ) Hi guys. I posted this over at the troubleshooting section and nobody replied. So I figured I would try here. I have a new to me AR. I ran about 50 rounds through it and took it apart to clean it. just removed the bolt carrier, so i could run some swabs down the barrel. I put it back together and now it will not eject or partially eject to spent round. When I manually cycle the action it works fine. 60 peopole have looked at it over in troubleshooting and no replies, I know michigan has some answers. Thanks guys.  |
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I did not disassemble the bolt, just removed it to clean the barrel.
Everything went back together good. Did not do anything else to it. Can the gas system get out of alignment? It is an old AR. The lower is a PWA a couple 100 serial numbers from pre-ban, but it has not been used hardly at all. How can I check the gas alignment? thanks, I knew I could get some answers here |
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Quoted: I did not disassemble the bolt, just removed it to clean the barrel. Everything went back together good. Did not do anything else to it. Can the gas system get out of alignment? If the gas key is not well anchored and staked, yes it can become misaligned. Too, make certain the gas tube is secured in the gas block via a roll pin. ( If the gas tube is moving around and not in sync with the gas hole in the barrel, this will cause a leak, and thus the bolt will fail to cycle. ) It is an old AR. The lower is a PWA a couple 100 serial numbers from pre-ban, but it has not been used hardly at all. How can I check the gas alignment? Look to see with the bolt closed the gas key lines up with the gas tube. thanks, I knew I could get some answers here |
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I took it apart and everything is good. I ran a q-tip inside the gas tube on the bolt carrier and it is pretty clean. Should I be looking at the gas system at the bolt carrier for the problem, or do you think it is the gas system in front of the carrier? Whats the best way to get to the gas system?
The action cycles good. It gets kind of stuff once it hits the mid point of the cycle, but like I said I don't think the gun has been used at all. |
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Quoted: I take it you examined alignment of the gas key on the carrier with the gas tube. If the gas key is firmly attached to the carrier and aligns with the gas tube, I'd think the issues are forward.I took it apart and everything is good. I ran a q-tip inside the gas tube on the bolt carrier and it is pretty clean. Should I be looking at the gas system at the bolt carrier for the problem, or do you think it is the gas system in front of the carrier? Whats the best way to get to the gas system? The action cycles good. It gets kind of stuff once it hits the mid point of the cycle, but like I said I don't think the gun has been used at all. For further investigations, remove the upper handguard, firmly grasp the gas tube, pull to the rear and see if there's any looseness or play. If so, then perhaps the roll pin holding the tube in the gas block has gone missing and you're leaking gas between the port in the barrel and hole in the gas tube. Another possibility, albeit remote, is the barrel gas port has become clogged thus not permitting gas to flow through the tube. You might try spraying some Gunscrubber ( or the like ) in the gas tube from the receiver end, and with the barrel pointed down you should note the fluid running out the end of the barrel. ETA: Something else to check: look at the gas rings on the bolt and see what shape they're in. |
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Quoted: Where are the gas rings on the bolt? Do I have to remove the bolt from the carrier to see them? I did not notice any rings on it at all. thanks The gas rings are near the tail end of the bolt; and yes, you'll have to remove the bolt from carrier to locate them. There are 3 small rings situated in a groove on the rear of the bolt. You'll want to make certain they're in good condition. Too, the rings are "split" and you might check to see the "splits" are not all aligned. |
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Quoted: I will take it apart tonight hopefully. I will run some hoppes no.9 down the gas tube also. thanks alot for all the help. How many beers is this costing me? Uzi, I am in Lapeer. None here: simply goodwill from "gun-folk".  Check the gas rings before you undertake any other remedy. |
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We will be shooting at Linden Sportsmens Club Wednesday night atarting at 6pm. If you are still having problems, bring it over to the pistol bays and we'll take a look at it. A few of us will be out there on the rifle range on Saturday too. No beers required, though they would not be turned down either! |
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I got the bolt apart and the gas rings were staggered. There was some residue on the bolt, but not to heavy. I am going to give it a good scrubbing and reassemble.
Upon looking closely at the extractor, it looks like it doesn't have much of a lip on it. The spring feels pretty stiff. If I can get a good picture of it I will post. I am wondering if that is why I can cycle it by hand slowly, but under fire it fails? thanks again. |
| I took the bolt apart and gave it a good scrubbing. It wasn't to dirty. I didn't get a picture of the extractor. I put it back together and ran some rounds through it. I had the same problem. It was leaving the spent shell in the chamber, not even pulling it out a little bit. I had to get the round out of the chamber with a cleaning rod! The action on the bolt does not seem to smooth. It is a mystery to me. |
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Quoted: I took the bolt apart and gave it a good scrubbing. It wasn't to dirty. I didn't get a picture of the extractor. I put it back together and ran some rounds through it. I had the same problem. It was leaving the spent shell in the chamber, not even pulling it out a little bit. I had to get the round out of the chamber with a cleaning rod! The action on the bolt does not seem to smooth. It is a mystery to me. So, the action is fully cycling when you fire, but the round isn't being extracted from the chamber? Correct? The "glitch" you feel when manually cycling the action is most likely the result of the BCG cocking the hammer. Thorough lubrication of the contact areas of BCG and hammer will smooth this out. |
| Try loading one round in the mag and firing. If the bolt locks back on the empty mag, but doesn't eject the spent casing you more than likely have an extractor issue. If the bolt doesn't lock back, Check the gas system. There are obviously exceptions, but that should give you a good general idea of which direction to look. |
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Swap the bolt carrier assembly with one from another AR that works. If your AR still has FTE issues, you have a gas tube/port issue. If the problem goes away, there is a problem with your bolt carrier assembly. Make sure you give the kind gentleman's bolt carrier back and don't give him your bad one.  |
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Alright last night took the whole shootin' match apart. Scrubbed the chamber throughly. Inspected all surfaces. Inspected the pieces of the bolt. Reassembled bolt. Reassembled rifle. I was going to push some rounds through today, but I have been at work all day and the light is fading fast. Thursday will have to be day.
The rifle is chamberd 5.56. The rounds I am using are headstamped 9/81 MAL. The rounds came with the rifle. The box of 20 rounds was $3.20!!! Does the 9/81 make them manufactured 1981? I do have white box .223, but do not want to burn any ammo. I also have some Hornady varmit express rounds. I will probably use some of those rounds for the next test. thanks for all the help guys |
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The barrel is stamped 5.56. I am assuming it is 5.56. The ammo that came with the gun is 5.56. I have never had it gagued though.
I planned on shooting it tonight, but worked until dark again, tomarrow is supposed to be a half day. I will throw .223 ammo in for the next test. I will post results. thanks |
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I ran both kinds of ammo through it. I have cleaned everything from the chamber back. Gas key is tight on carrier. How do I check the gas tube forward?
The .223 ammo ejected one shell, jammed 3 others The 5.56 ammo ejected zero out of three. The bolt is not locking back after last round with any ammo. Went to Williams to buy a new extractor and springs. They wanted $29 bucks for just the extractor. I will be ordering one online. |
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A quick method to check whether there's an issue with the gas tube and barrel port would be to spray some Gunscrubber ( or the like ) into the gas tube from the receiver end; with the barrel pointed downwards, the fluid should run out the end of the barrel. Also, you can remove the handguards, spray the fluid, and ascertain if there leakage between where the barrel port and gas tube meet. |