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Posted: 7/22/2011 11:59:52 AM EDT
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Hey all,
Few problems with my AR, im about 1200 rounds through my Delton AR midlength. This is my first AR and I'm constantly am having problems with it, I understand it can be many factors. I clean it usually after every shoot but have slacked here and there but it seems to jam quite often. Whether its the round not entering correctly, not completely entering the chamber and yesterday a round actually became stuck in the chamber. I'm using Tapco mags, before I used wolf ammo and now am using "Herters". I've watched many videos on cleaning thinking I am not cleaning it properly, I use a bore snake and clean out the upper with a jag when need be. The AR was cleaned after my last shooted and well lubed... I know its hard to help over the internet and diagnose but I'm just wondering, is it mags, the cheap ammo I use or my cleaning job??? I've actually been thinking about doing the Adams arms conversion, I know many are back and forth on the subject of piston AR's... |
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In order, I would think it's mags, ammo (weak) and last (and not likely) your cleaning (assuming you do not have a receiver/barrel extension feed ramp mismatch).
I would try some (cheap) GI Aluminum mags and/or some "high grade" 5.56 like IMI or Federal M855 or M193. If that doesn't work the next easiest thing to check would be your buffer; do you know what buffer weight you are running? ARs are actually quite happy to run dirty as long as they are wet (well lubed) as well. I'm going to have about 4 spare seconds the next time I'm home (AZ) or we'd sort this out proper! |
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Quoted: You might have a chamber full of residue. You could get a chamber brush and give it a bit of a cleaning. Are you running the gun wet? ARs can run filled with gunk if you keep them wet. A boresnake will not properly scrub out the chamber. Get a chamber brush, some bore cleaner and scrub that bad boy down. Also consider some new mags. Pmags or the steel teflon ones from 44mag.com are both excellent. |
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+1, if you arent using a chamber brush there you go, a bore snake is only for cleaning the residue out of the barrel. if that dont fix it, its probably your mag.
also, look at the feed ramps. http://www.ar15armory.com/forums/uploads/1308570177/gallery_18313_138_117457.jpg if its a newly developing problem, i doubt its this cuz u would have had problems all along...but make sure just in case. |
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Quoted:
In order, I would think it's mags, ammo (weak) and last (and not likely) your cleaning (assuming you do not have a receiver/barrel extension feed ramp mismatch). I would try some (cheap) GI Aluminum mags and/or some "high grade" 5.56 like IMI or Federal M855 or M193. If that doesn't work the next easiest thing to check would be your buffer; do you know what buffer weight you are running? ARs are actually quite happy to run dirty as long as they are wet (well lubed) as well. I'm going to have about 4 spare seconds the next time I'm home (AZ) or we'd sort this out proper! this perfectly stated. |
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Definitely clean out the chamber. Also, what buffer spring and buffer weight (carbine [gold, no marking], H, H2, H3, 9mm, ST-T2) are you using? My gun short-strokes if I try to shoot crappy weak ammo (anything steel cased basically) with a heavy weight spring and an H2 buffer. Going to the regular spring and carbine buffer lets me shoot basically anything and using the regular carbine spring with the H2 buffer lets me shoot 90% of weaker ammo. If it gets stuck on feeding, it's very likely either the magazines or the gun is under gassed. A good test: load only a single round into the magazine, load the gun with that mag and fire. Did the bolt lock back? If it isn't locking back, it's probably because the gun isn't getting enough gas to cycle the action fully. It's doing enough to extract the gas and eject it out of the ejection port but not enough to go all the way back far enough to properly lock back or strip a round off the magazine. |
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Quoted: Have you checked to ensure that the gas key is not coming lose? If I had to guess, I would think it would be more likely to have an oversized gas port. It would have to be extremely overgassed to cause the feeding problems he's talking about. The bolt carrier would need to be cycling extremely quickly. Which is very unlikely especially with the weak ammo he's using. |
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Surplus ball ammo (Federal, Lake City or Winchester white box) are head and shoulders better than what you are using. I doubt you have a problem outside your ammo selection.
Every time I shoot an AR I pull the BCG and clean the bolt's tail of carbon and scrub the locking lugs and bolt face with solvent and a toothbrush. I use a chamber brush a couple of turns and spray the chamber with break cleaner. I follow that with a couple of passes down the bore with solvent. I use CLP on everything when done and I relube with CLP just before shooting it again. AR's will give incredible reliability if cleaned in this fashion. Almost all of the complaints on this and other forums usually start out with Russian ammo. Take that into consideration when you make your next ammo run. |
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Quoted:
Quoted:
Have you checked to ensure that the gas key is not coming lose? If I had to guess, I would think it would be more likely to have an oversized gas port. It would have to be extremely overgassed to cause the feeding problems he's talking about. The bolt carrier would need to be cycling extremely quickly. Which is very unlikely especially with the weak ammo he's using. I agree completely. From what he describes it does not sound like an issue associated with it being overgassed. I was just thinking that it was strange as I would guess that gun has an oversized gas port. |
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crappy mags and or ammo will not be compensated for by pricey additions like a piston conversion- get some good quality mags (brand new or known to function gi mags are a good start) as well as good quality brass cased ammo. Only if it doesn't function with this combination and a well lubed gun do you actually have a gun problem.
FWIW I built a rifle on a delton parts kit and with gi mags and brass cased ammo it works flawlessly. I doubt it is anything but a poor choice in ammo or mags. |
| I appreciate all the help, I didnt know that u still needed to clean with a chamber brush. Gave it a good cleaning yesterday. I have the gold "Carbine" buffer... I had read before that keeping the bolt wet & it will still shoot. I usually just lube it after my cleaning, but I'll start throwing a little on when I get to the range to see if that helps out. I'll buy some new mags today and some new brass when I run through all this. Sadly I still have a bunch left lol. Headed out next weekend so I'll let u guys know how it does. |
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