AR Sponsor
Posted: 1/14/2016 7:59:46 PM EDT
|
Whats up ARFCOM. So I went to the range today and went to go sight in my new Vortex Spitfire 1x (pretty nifty little red dot, actually) and I am having some extracting issues. I took a couple pictures of what was going on.
Link to album It seemed to happen every other round, then it would go away, and then come back. I would fire one, it would extract normally, then fire the next and they would get stuck like in the picture. All ammo was American Eagle. In the 4th picture, the top two cases are XM193 and the bottom two are .223. There were a couple instances where I had to use a screwdriver to leverage the empty case out of the chamber. Rifle Specs:
Whats weird is I built this AR last year in July and it was cruising through XM193 with no problems at all. This started in the fall of last year which is also the first time I had used .223 with it. Unfortunately, I only have one complete BCG and only 3 mags, all Magpul, so I can't try with different mags or a different BCG. Any help or suggestions would be awesome. Thanks for the help! |
|
Quoted:
Almost looks like it's undergassed to me. But that's just me speculating from your pics and weapon specs. Hmm... could be? I did have the upper sent off to ADCO to have them remove the BCM gas block and install the DD RIS II. They reinstalled the BCM LPG, however. I'm pretty sure I wasn't having any problems beforehand. Not saying its ADCO's fault, but maybe that has something to do with it. Is there any other info that would help? |
|
Are your mags rubbing on the BCG? I would try some regular USGI mags. Because yeah, it seems like the bolt is being slowed down to the point that it won't fling out the round. Now what's causing the slowing...... Mags rubbing, undergassed, no lube, gas tube blocked up (seems unlikely), chamber burr...... aaaaah, what else.... out of spec ammo..... That many seems like not likely though.
You could try a normal ole carbine buffer. You're not helping the 14.5 middy cause at all.  
|
|
Quoted:
Are your mags rubbing on the BCG? I would try some regular USGI mags. Because yeah, it seems like the bolt is being slowed down to the point that it won't fling out the round. Now what's causing the slowing...... Mags rubbing, undergassed, no lube, gas tube blocked up (seems unlikely), chamber burr...... aaaaah, what else.... out of spec ammo..... That many seems like not likely though. You could try a normal ole carbine buffer. The mags rubbing the underside of the BCG could be causing it, yeah. I actually took the BCG apart and did a quick cleaning and lubed it up with Slip2000 EWL before I went to the range. I did notice that there was some dark yellowish markings on the underside of the BCG, could be my mags? They're all FDE. ETA: Just saw your edit.... Shut up
|
|
Quoted:
The mags rubbing the underside of the BCG could be causing it, yeah. I actually took the BCG apart and did a quick cleaning and lubed it up with Slip2000 EWL before I went to the range. I did notice that there was some dark yellowish markings on the underside of the BCG, could be my mags? They're all FDE. ETA: Just saw your edit.... Shut up Quoted:
Quoted:
Are your mags rubbing on the BCG? I would try some regular USGI mags. Because yeah, it seems like the bolt is being slowed down to the point that it won't fling out the round. Now what's causing the slowing...... Mags rubbing, undergassed, no lube, gas tube blocked up (seems unlikely), chamber burr...... aaaaah, what else.... out of spec ammo..... That many seems like not likely though. You could try a normal ole carbine buffer. The mags rubbing the underside of the BCG could be causing it, yeah. I actually took the BCG apart and did a quick cleaning and lubed it up with Slip2000 EWL before I went to the range. I did notice that there was some dark yellowish markings on the underside of the BCG, could be my mags? They're all FDE. ETA: Just saw your edit.... Shut up LOL. You probably should've started with a regular carbine buffer because of that whole smaller dwell time thing. But I'm telling you, I've yet to try any magpul mags because I'm skeptical. It's not the first time I've seen someone post issues that I think had a good chance of being magpul mag related....... I still only use the grey 20 and 30 round USGI mags...... I'm so last century...... 
Actually, that one guy from AZ who moved to Michigan, I forget his screen name. He hates magpul mags. He claims he's seen them come apart at the seems and things like that. I think is what he said. Like I said, I'm skeptical. Obviously a lot of people use them and they work fine, but....... there it is. |
|
Quoted:
Hmm... could be? I did have the upper sent off to ADCO to have them remove the BCM gas block and install the DD RIS II. They reinstalled the BCM LPG, however. I'm pretty sure I wasn't having any problems beforehand. Not saying its ADCO's fault, but maybe that has something to do with it. Is there any other info that would help? Quoted:
Quoted:
Almost looks like it's undergassed to me. But that's just me speculating from your pics and weapon specs. Hmm... could be? I did have the upper sent off to ADCO to have them remove the BCM gas block and install the DD RIS II. They reinstalled the BCM LPG, however. I'm pretty sure I wasn't having any problems beforehand. Not saying its ADCO's fault, but maybe that has something to do with it. Is there any other info that would help? Well....what changed? Worked before you sent it off....now it doesn't. Do the math. You have a gas problem resulting from the removal of the gas block and not being re-installed correctly. I have nothing against ADCO but don't believe in coincidence. I doubt you have mag issues all of a sudden. If nothing else changed except the trip to ADCO...then Logic says look at last thing done to it. |
| Lock bolt back, load one round in mag and charge. Whether the bolt locks back or not will tell you a lot. If it does, then try 2 rounds, then 3 and so on. Tight chambers can be sensitive to different cases. It delays releasing the brass. If it does not lock back and head space is good then probably like everyone said, most likely a gas issue. Craig |
|
Quoted:
Well....what changed? Worked before you sent it off....now it doesn't. Do the math. You have a gas problem resulting from the removal of the gas block and not being re-installed correctly. I have nothing against ADCO but don't believe in coincidence. I doubt you have mag issues all of a sudden. If nothing else changed except the trip to ADCO...then Logic says look at last thing done to it. Quoted:
Quoted:
Quoted:
Almost looks like it's undergassed to me. But that's just me speculating from your pics and weapon specs. Hmm... could be? I did have the upper sent off to ADCO to have them remove the BCM gas block and install the DD RIS II. They reinstalled the BCM LPG, however. I'm pretty sure I wasn't having any problems beforehand. Not saying its ADCO's fault, but maybe that has something to do with it. Is there any other info that would help? Well....what changed? Worked before you sent it off....now it doesn't. Do the math. You have a gas problem resulting from the removal of the gas block and not being re-installed correctly. I have nothing against ADCO but don't believe in coincidence. I doubt you have mag issues all of a sudden. If nothing else changed except the trip to ADCO...then Logic says look at last thing done to it. Agree. Looks undergassed. You recently had work done. I also don't believe in coincidence. You can confirm it by doing the "one round in the mag test" as suggested. I'm betting your BCG won't lock back, indicating a lack of gas. |
|
I had a short stroke problem on a custom build with an Adams Arms piston setup.
It would fire perfect the 1st time, 2nd shot I could see the shell lob out really close to rifle. 3rd shot would stovepipe or carve the next round into the other. I swapped out BCG with an extra I had and it fires perfect again. Every time. I am assuming it is an ejector spring that is somehow loosing its tension with each shot? I have read the ejector plunger can be hanging up on the brass with its squared off edge? |
|
Quoted:
Thanks for the suggestions guys! I ordered 3 USGI style mags and a carbine buffer from BCM and they should be here Tuesday. Hopefully this will fix the issue. I'll check the extractor as well. You have not been listening. You have a gas issue somewhere. You are spending money on new buffer and mags when you have not inspected your entire gas system.  Throwing money at the problem always works.
|
|
Quoted:
You have not been listening. You have a gas issue somewhere. You are spending money on new buffer and mags when you have not inspected your entire gas system. Throwing money at the problem always works.Quoted:
Quoted:
Thanks for the suggestions guys! I ordered 3 USGI style mags and a carbine buffer from BCM and they should be here Tuesday. Hopefully this will fix the issue. I'll check the extractor as well. You have not been listening. You have a gas issue somewhere. You are spending money on new buffer and mags when you have not inspected your entire gas system. Throwing money at the problem always works.Well since it was my suggestion, I say lets see how it shoots using those new parts. I'm not saying it's not a gas issue. But runnin a normal carbine buffer in a 14.5 middy is probably a good idea. As many people claim they can be a little weak in the gas dept to begin with because of the shorter dwell time. An H buffer is probably best left to 14.5 carbines I'm thinking. So it's not like he's wasting money. Plus what's wrong with having a few USGI mags for a baseline for any AR? |
|
Quoted:
Well since it was my suggestion, I say lets see how it shoots using those new parts. I'm not saying it's not a gas issue. But runnin a normal carbine buffer in a 14.5 middy is probably a good idea. As many people claim they can be a little weak in the gas dept to begin with because of the shorter dwell time. An H buffer is probably best left to 14.5 carbines I'm thinking. So it's not like he's wasting money. Plus what's wrong with having a few USGI mags for a baseline for any AR? Quoted:
Quoted:
Quoted:
Thanks for the suggestions guys! I ordered 3 USGI style mags and a carbine buffer from BCM and they should be here Tuesday. Hopefully this will fix the issue. I'll check the extractor as well. You have not been listening. You have a gas issue somewhere. You are spending money on new buffer and mags when you have not inspected your entire gas system. Throwing money at the problem always works.Well since it was my suggestion, I say lets see how it shoots using those new parts. I'm not saying it's not a gas issue. But runnin a normal carbine buffer in a 14.5 middy is probably a good idea. As many people claim they can be a little weak in the gas dept to begin with because of the shorter dwell time. An H buffer is probably best left to 14.5 carbines I'm thinking. So it's not like he's wasting money. Plus what's wrong with having a few USGI mags for a baseline for any AR? More mags are always good but the OP should really inspect the entire gas system starting with the gas block ADCO took off and then reinstalled. I have only heard good things about ADCO but since the gas block was removed I don't see how you cant look there first along with the gas tube seal. I say it again...I don't believe in coincidence. |
| Agree with those who suggest checking the last thing that was done before the problem surfaced...the gas block. You need to insure that they got the gas port is lined up with the replacement block. I'm assuming the new gas block isn't adjustable, correct? On the buffer, I don't think you're wasting money getting the standard carbine weight buffer for a 14.5 middy. They usually need most all the gas available, so slowing down the BCG with a heavier buffer might not be advisable. I have a 14.5 middy Voodoo barrel from Adams Arms, and it's perfect with a standard carbine weight buffer. Get the gas port alignment issue sorted checked out first. Eliminate one thing at a time or you can end up chasing your tail a bit. |
| I would check the gas block position (mounted to far forward, and/or canted). Loose gas key. I'd also take a look near the gas tube insert in the gas block to see if there is a lot of carbon build up on the gas tube, this would suggest that the ID in the gas block is too big, and that too much gas leaks out of there. If you have access to an different extractor, I'd try that too, |
|
Quoted:
Sounds like your ejector may be gunked up. Take your bolt out and push your ejector in and out with a pen or a bullet tip and see if it moves freely or gets stuck - or lube it and see if any gunk comes out when you push it. Check your extractor (and ejecto)r, looks similar to what happened to me with a bad extractor spring. I thought it was a gas issue initially. |
|
Quoted:
Almost looks like it's undergassed to me. But that's just me speculating from your pics and weapon specs. Yes, I'm pretty sure you nailed it. Gun was fine before the gas block removal, same mags, same buffer, same bolt so I'm sure the gas block might have moved or reinstalled a little off. As other have suggested, test with 1 rd to see if the bcg locks back, you can pretty much tell if there is adequate gas volume to operate. |
AR Sponsor