No, but it's the nearest screw to the bolt, and if it was loose it could cause cycling issues.
AR having feeding issues
- Thread starter Encoreman
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No, but it's the nearest screw to the bolt, and if it was loose it could cause cycling issues.
Phidelt208
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Like others have stated we really need more info to help. This could be a few things or a combination of things going on.
Factory ammo? Its sounds like he's on the right tracking checking different mags.
Start with any mods that may have been done to it or any recent changes.
If the gun is brand new send it back to the manufacture, if you start tinkering they may give you a hard time about returning it.
A co-worker just bought a brand new S&W AR-10 in 308 and it won't cycle correctly so these things do happen.
Factory ammo? Its sounds like he's on the right tracking checking different mags.
Start with any mods that may have been done to it or any recent changes.
If the gun is brand new send it back to the manufacture, if you start tinkering they may give you a hard time about returning it.
A co-worker just bought a brand new S&W AR-10 in 308 and it won't cycle correctly so these things do happen.
I’m looking for a specific weight. Is it 3 ozs? 4 ozs? 5ozs? Or a specific buffer. Carbine? H? H2? H3? Rifle? A5H2? A5H3?
To be clear, I’m talking about in spec 5.56 ammo.
H3 buffers on an M16 carrier with an undergassed barrel.
https://www.arbuildjunkie.com/choosing-the-right-buffer-for-your-ar-15/ While this may seem like an insane amount of information to process to get a simple rifle to work, 99% will work right new, 99% of the 1% that don't will be factory warranty fixes. The other 1% of 1% is where you need to read into this level of information.
If its home made, especially if its a home made receiver, its different, but the OP didn't give enough info.
Too heavy, as stated is when it stops working. Short stroking. Depending on the barrel maker, and some factors, that could be a standard Carbine buffer on an AR15 carrier, on up to a 9mm buffer on an M16 carrier. But they will generally all work fine with any carrier on a carbine, H1, H2, and H3 buffer. 3-5.5 oz. Fine tuning is for improperly made rifles.
An under gassed AR is under gassed no matter what buffer is used.
Is a rifle buffer too heavy?
you are right, as I mentioned in the same post, a correctly gassed AR will cycle the heaviest buffer. But this isn't at that point yet. he's still trying to get the rifle to run. For most people thats good enough, and a faulty undergassed rifle that works 100% of the time is fine too. Sure it won't work 100% of the time in all conditions, but its still a hole lot better than 80% of the time in ideal conditions.
I used to have a truly undergassed rifle. Worked fine, except when it was really hot, it wouldn't lock back on empty. Always cycled fine, no matter what.
I still didn't like it, and ended up replacing the A2 gasblock (oh what fun that was!).
A rifle buffer isnt too heavy, but it is too long. I assume the OP's rifle is a 16" carbine with an M4 stock. I assume this based on it being the majority, by far, of rifles out there.
A rifle buffer and an H3 buffer are about the same weight. Therefore, if a rifle buffer isn’t too heavy, neither is an H3.
briansmithwins
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Start with the standard weight for your setup. If the rifle works w/o signs of excessive bolt carrier velocity you're done.
If you have excess BCG velocity add weights until the rifle runs smoothly and the BCG still locks open on an empty mag.
BSW
uh yea, and I said a proper rifle will handle a H3. But the OP has something improper going on. A rife buffer is still too long for a carbine tube.
Master Blaster
Member
Could be just a weak magazine spring, or even dirt or a burr inside the magazine. Try different magazines and clean and replace the spring on the one that is not feeding.
entropy
Member
Replace the magazine(s) with new one(s) and run it wet. If it does not work then, find an Armorer who has experience with the AR.
Horse hockey. When built and maintained properly they are a very reliable and robust rifle. The bolt carrier key screw you had to tighten should have been staked in the first place, and if you didn't when you tightened it, you should go back, check it, tighten it if needed, and then stake it correctly, and the other one after checking.
Horse hockey. When built and maintained properly they are a very reliable and robust rifle. The bolt carrier key screw you had to tighten should have been staked in the first place, and if you didn't when you tightened it, you should go back, check it, tighten it if needed, and then stake it correctly, and the other one after checking.
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