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  #1  
Old 06-23-2020, 6:50 PM
ndallape ndallape is offline
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Default New AR build cycling issue

Just built a new AR-15. Seems to run fine.

Only problem is every so often (maybe twice per 10 round mag At most) it won’t load a new round from the mag.

It ejects the spent shell no problem but every so often I’ll pull the trigger and nothing because a round wasn’t loaded.

Have to pull the bolt back to chamber the next round.

There was a few instances were the bolt didn’t go all the way forward as well.

Any ideas what could be the issue?
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Old 06-23-2020, 7:20 PM
ndallape ndallape is offline
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Tried 2 different mags.

Used American eagle 223 rounds.

16” barrel. Mid-length gas system.

Under rail gas block
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  #3  
Old 06-23-2020, 7:24 PM
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m16 m16 is offline
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Did you lube it?
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Old 06-24-2020, 4:35 PM
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What kind of gas block do you have. I had same problem once, turned out the gas block was comming loose because the block I have was held on by set screws and was comming loose & losing pressure. Some red thread lock and an allen key fixed it.
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Last edited by Neil McCauley; 06-24-2020 at 4:46 PM..
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Old 06-24-2020, 4:44 PM
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Parts list?
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Old 06-24-2020, 6:09 PM
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What buffer are you running?
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Old 06-24-2020, 6:25 PM
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Quote:
Originally Posted by m16 View Post
Did you lube it?
+1

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Parts list?
+1
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  #8  
Old 06-24-2020, 6:37 PM
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Quote:
Originally Posted by ndallape View Post
Just built a new AR-15. Seems to run fine.

Only problem is every so often (maybe twice per 10 round mag At most) it won’t load a new round from the mag.

It ejects the spent shell no problem but every so often I’ll pull the trigger and nothing because a round wasn’t loaded.

Have to pull the bolt back to chamber the next round.

There was a few instances were the bolt didn’t go all the way forward as well.

Any ideas what could be the issue?
Sounds like it just needs more lube in all the right places and make sure you use m193 equivalent powered ammo. Break it in. Some AR's need more rounds to properly break in.
Burn 200 rds in it first before you go swapping parts around.
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Old 06-24-2020, 6:55 PM
MarikinaMan MarikinaMan is offline
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If it ejects cases at the trajectory of a limp dick, check the gas system.

3-4 o’clock ejection and lands 2 feet from your right foot?
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Old 06-24-2020, 7:47 PM
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Sounds like it might be under gassed or the buffer is too heavy so the bolt isn't going back enough.

As others said, make sure the gas key isn't loose and gas isn't blowing out anywhere weird.
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Old 06-24-2020, 7:57 PM
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Try some Wolf ammo, lots of gas in those bad boys.
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Old 06-25-2020, 4:04 AM
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Quote:
Originally Posted by ndallape View Post
Just built a new AR-15. Seems to run fine.

Please tell me, this is NOT the first AR you've ever owned.
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