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Post by butlerj on Jan 5, 2020 20:58:39 GMT -5
Anyone have one? I bought one but am having some trouble with feed ramps, either jamming every other round or the next round does not get chambered.
I've done everything the owner manual says except send it in.
Clean, Wet bcg, Ammo 55g and 62g Different mags,
Can't seem to find anyone else having trouble with theirs. I have not removed the forearm or even know how the barrel gets removed. But wondering maybe it's tweaked or something. Would like to try all possibilities before having to ship the gun.
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Post by esshup on Jan 6, 2020 0:46:52 GMT -5
Anyone have one? I bought one but am having some trouble with feed ramps, either jamming every other round or the next round does not get chambered. I've done everything the owner manual says except send it in. Clean, Wet bcg, Ammo 55g and 62g Different mags, Can't seem to find anyone else having trouble with theirs. I have not removed the forearm or even know how the barrel gets removed. But wondering maybe it's tweaked or something. Would like to try all possibilities before having to ship the gun. Have you tried a different mag?
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Post by M4Madness on Jan 6, 2020 6:27:56 GMT -5
It sounds like it is short stroking to me, meaning that the bolt carrier is not traveling fully to the rear before picking up the next round. Try loading a single round into a magazine and then loading that round into the chamber and firing it. The bolt should lock back after the magazine is empty. Try this a few times -- it should lock back EVERY time. If it doesn't, then you definitely have a short stroke situation, which can be diagnosed after proof of its existence.
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Post by Deleted on Jan 6, 2020 7:27:29 GMT -5
The good news is, if you do have to send it back to Ruger, their Customer Service is top tier.
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Post by bullseye69 on Jan 6, 2020 9:17:25 GMT -5
I would try a different brand of mag. Some are finicky with mags. If it is short stroking might need to clip the buffer spring a little.
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Post by butlerj on Jan 6, 2020 10:48:25 GMT -5
I don't know the brand but I had bought a second mag the day I bought the gun at RK it's polymer also, both tend to do the same thing.
I'll try running one round. For lock back but pretty sure it does lock back upon empty mag. When I first shot it I was loading 10-15 rounds. And was racking when it needed until empty hoping it would improve after some use.
Then I tried full mags only to continue racking. I went to buy a steel/metal mag but at $30 dollars I was not going to shell out just to see if it would work compared to the other two mags and one being the gun was supplied with.
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Post by M4Madness on Jan 6, 2020 11:37:01 GMT -5
The only magazines I have ever used are polymer Magpul PMAG's and aluminum USGI magazines.
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Post by dbd870 on Jan 6, 2020 12:44:16 GMT -5
The only magazines I have ever used are polymer Magpul PMAG's and aluminum USGI magazines. Same here
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Post by butlerj on Jan 6, 2020 14:42:17 GMT -5
It came with a pmag. I guess that's what Ruger contracted to use.
About 15 odd years ago I bought two Magpul mags for my sks a 30rnd and a 40 rnd from the 1500 gun show. They did not work. I loaded them up then shoot and the springs would stick not push bullets up tried various counts and same thing, they sat for dust then one day I just said trash.
I'm sure they have up their game since then both AR mags seem to function correctly as far as I can tell. But the left feed ramp on this AR shows signs where the bullet dragged up it.
I am wondering if it just needs some lube there. Or if the barrel is off to where that side sticks up or down lower or at some angle and doesn't want to feed. As it's every other bullet that jams...
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Post by medic22 on Jan 6, 2020 15:20:40 GMT -5
Remove the handguard and make sure the gas block is properly aligned.
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Post by mgderf on Jan 6, 2020 18:01:53 GMT -5
Can you post a pic of the feed ramps?
This is a factory built firearm, right? Sounds to me like an issue with the feed ramps. There are a couple of different barrel feed ramp profiles, and they need to match the barrel extension ramp profile.
I can't imagine a factory rifle leaving the factory with the incorrect t barrel extension, but I'll bet it's happened. Google M4 feed ramps and I believe you'll find a comparison chart.
Once you get it figured out, be sure to come back and tell us what the issue was.
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Post by butlerj on Jan 6, 2020 18:52:35 GMT -5
It doesn't appear to be off center. But I read somewhere that the design of the feed ramps were like M4. And something different about the bolt. An Open design.
My first AR..all factory.
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Post by mgderf on Jan 6, 2020 19:00:19 GMT -5
An "improper" barrel extension will not appear "off center". I can't post pics, or even link what I'm talking about, but some of the barrel extensions have deeper groves (ramps) than others. The wrong extension on a barrel can result in a very small "flat spot" where the barrel extension meets the barrel cut-outs.
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Post by M4Madness on Jan 6, 2020 19:14:07 GMT -5
Is there any side-to-side play in your magazine? If it were the right side jamming, I might have even considered that the right side of the magazine was dipping down under pressure from the bolt carrier.
My reason for initially suspecting short stroking was that it can jam a round due not having "enough of a run" to drive the round into the chamber. But, it certainly wouldn't favor one side only if that were the case.
For the barrel to be canted, the indexing pin in the barrel extension would have to be at fault, or the slot in the upper receiver that it fits into --and either would be a very rare occurrence in a factory rifle, especially one from a big company such as Ruger. I also couldn't see them using an M4 upper receiver with a standard barrel extension.
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Post by butlerj on Jan 7, 2020 8:10:43 GMT -5
I'll get a picture this afternoon. My youngest son kept me busy last night. There is a little play with the magazines. But only maybe .5 mm of space-movement and thats with both brands of mags side to side.
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Post by butlerj on Jan 7, 2020 14:41:29 GMT -5
I've yet to remove the handguard. I have tried but after removing the two bolts, Apparently I don't have the hand strength to remove it and have yet to come up with a careful way to do it.
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Post by butlerj on Jan 7, 2020 14:42:59 GMT -5
Mind the fibers I have kept it covered on the rest with an old white tee on my work bench.
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Post by mgderf on Jan 7, 2020 18:19:25 GMT -5
Ramps look o.k., maybe a little sharp on the edges. Is there any sign of uneven wear on the bolt/carrier, and/or the gas key?
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Post by butlerj on Jan 7, 2020 19:57:32 GMT -5
After the second run and cleaning nothing looked bad. very light finish wear.
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Post by butlerj on Jan 9, 2020 15:35:16 GMT -5
checked gas block screw it's already super tight.
About an hour worth of wait time on the phone. That's what they suggested to check into.
Think I will go a fourth round and try again
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