Hello guys, need your help with some jamming issues on my AR15. It is a 16in Carbine with Spikes lower and Rguns upper.
My first range trip a month ago was fine, shot about 100rds to test it out and no issues. 2nd and 3rd range trip (today) I’ve had some issues with not ejecting the empty cartridges.
On my 2nd trip apparently the spring on the extractor fell out (dunno how); I always field strip and clean down to the extractor after each range session. So on that range trip it would not extract the empty cartridge after every shot. RO helped me figure this out so a extractor is on order.
Today (3rd range visit) I went to the range and borrowed my roomate’s BCG (Spikes) to use on my AR because I want to sight in my new scope. First mag shoots without any problems, shooting 1rd every 2seconds. The second mag I do a bit of rapid fire and around 25rds it fails to extract the empty cartridge with another round trying to load.
What could be the issue? I am using P-mags and my friend’s Bolt carrier group, and the rifle is lubed. Thanks in advance!
Are your mags marked so that you can tell if it happens with the same mag?
How many rounds through it? Sounds pretty new so not sure why you’ve been stripping all the way down to removing the extractor…are you sure haven’t damaged it?
I had an issue with a 450 Bushmaster. Case wouldn’t eject and was jamming the gun. Turns out the extract or was a hair too tight. I diagnosed it by simply hooking a case rim under the extractor. I expected the case to release from the extractor with little or no resistance. Mine didn’t. The extractor kind of grabbed the case. My solution was to mix up some abrasive powder with grease and apply it to the inside of the rim of a case and rotate it under the extractor. It didn’t take long, a couple of minutes of this treatment to fix the problem. Strangely, the problem didn’t appear immediately when the gun was new, it appeared after about 100 shots. If you don’t have any abrasive powder you might try a steel case with a little oil and see if that works.
I don’t know that you need to take the extractor off every time you clean a 5.56. I do so every time I shoot my 5.45 which is a LOT dirtier than any 5.56 I have ever seen. I have a couple of ARs, one DI and one piston, neither have had the extractor off and both have over 5K rounds down the pipe. Maybe I ought to clean under the extractor but so far, no problem.
What kind of ammo are you using? Steel case sometimes causes problems in some guns. Lacquered ones can glue up your chamber; plus steel doesn’t obturate the bore completely, allowing powder dookie to get between the case and the chamber walls.
Slightly rough chamber from the factory? Smith could polish her up.
Replace the extractor and use the Bravo Company spring, which some people claim is better than most factory springs.
N.B.: don’t overclean. Every couple thousand rounds, give your gun a bit of a scrubbing. Just keep adding lube generously.
EDIT - My first thought was to start with the easiest of problems to fix and work up from there, but after a couple other posts, the chamber may very well be the issue here.
I’ve never heard anything about the company, so I’m basing this on others opinions.
R-Guns uppers are crap for the most part and they are known to have tight chambers. My guess is that the chamber is tight is this is causing the failure to extract issue.
That’s what I’ve heard too about Rguns. And very poor CS, i.e. guns that took six months to be returned after repairs.
JusticeM4, this would be a good thing to try, especially before chancing sending your gun back to Rguns! My Daniel Defense upper very rarely would fail to extract but it was a big problem when it happened. I replaced the extractor with the BCM kit and haven’t experienced the issue since. I suppose you could also try the Crane O-ring, though I don’t myself.
Btw i’m using 223Factory brass (Remington and American Eagle). it is marked 5.56 on the barrel.
I went to the range again today and it fires ok in the beginning, but around 80rds it starts to jam. Granted I haven’t cleaned it since the 2nd range visit, it is generously lubed. Could be just a bit dirty in the chamber. I am still using my roomate’s Spikes BCG.
A Spikes upgraded extractor spring is on order. hopefully this will solve the issue. I have not heard too much about Rguns, but i hope this is the only issue i encounter with this upper.
Barrel markings mean nothing unless it is from one of the major companies. Many of the lessor ones have been known to mark barrels 5.56 and the chambers were not.
What is “jam”? Not being facetious but jam is something you put on toast. If you want to diagnose the issue then you need to be able to articulate what the issue is.
Are you experiencing a failure to extract or a failure to eject? Is there an expended round in the chamber with a live round feeding into it?
This is what we need to know. As I stated before this sounds like classic tight chamber syndrome. 80 rounds is nothing. I have run 10 times that in my weapon without cleaning in a single day.
At the end of the day you can play with extractors, O-rings, buffers and springs and all you are doing is more than likely putting a band-aid on it.
like all the above mentioned; R-guns is a no go. always number every mag you own. no reason for a detailed strip and cleaning after 3.5 mags unless you have an issue. either find a local smith to run a finishing reamer in your chamber or invest in a new barrel. an easy way to rule out your extractor is to swap complete bolt carrier groups with a friend for a range session.
As some have stated, tight chamber or bad extractor/spring or both. Get a new extractor, which you are already in the process of getting, a five coil extractor spring, with black insert, and do not use the doughnut…it’s too much tension, which will leave you with again, a stuck case.
That statement is as wrong as two boys fuckin. Please stop with the internet myth/Hearsay/Bullshit. Try and use a blow torch to see if you can melt the lacquer off and report back. The ones that I have seen were due to a worn extractor, or using the doughnut + insert + a 4 coil extractor spring, or a POS gun with a tight chamber. Myself and several others have proven this myth wrong over and over and over again…It does not “melt”, causing these types of failures. The closes theory is that in some instances, an uneven application of the lacquer on the case, which produces a “drip” of hardened lacquer, will cause the case dimension to be slightly increased/deformed and wedged into the chamber during the firing sequence, that “may” cause a stuck case. And that, is the best theory going, and it’s still only a theory. After personally shooting over 15K of lacquered Wolf, Tiger and Brown Bear, many times in carbine courses, and in regular range sessions, through 4 ARs, I have not had one issue with that ammo, running my ARs up to 4K rounds a couple of years ago to vet my ARs, without cleaning, just lube.
From the description I’m still not sure if we’re actually talking about extraction or ejection. OP, just to be sure…
Extraction is the act of extracting the empty case from the chamber as the bolt moves to the rear.
Ejection is the act of flinging the empty case free from the carbine through the ejection port.
So what you’re describing is the bolt moves to the rear and picks up the next round from the magazine but does not extract the empty case from the chamber, correct? When you clear it (lock bolt to rear, magazine out, rack charging handle 3x) does the empty case then extract and eject? My guess would be that the loaded round, the one that is trying to chamber into the base of the empty case, either falls free or sticks up vertically from the magazine when you remove it?
Not all AR parts are equal in quality and precious few companies know how to assemble ARs correctly. It isn’t rocket science, but so many screw it up or flat out refuse to do it correctly.
If I were you I’d return the upper to R-Guns for refund and buy a BCM, LMT, Daniel Defense, S&W or Colt upper assembly.
Let me clarify: it is not ejecting the spent case. It gets stuck at the ejection port and the following round is trying to load. Sorry about that.
Again, this is a used AR that was built by the seller. I’ve never heard of Rguns before buying this rifle, but at least it comes with a Spikes lower with T2 buffer.
I’m in the process of building a 300Blackout with quality parts (CMMG, DD, etc). This current rifle is only a plinking/range rifle so its not such a big deal that it isn’t top tier. My last Bushmaster M4 worked much better than this and had no failures after a few hundred rounds.
Now I’m confused.
