I would guess really crappy mental a well. I suspect AA gets their handles from Bobs House of Charging Handles and Bob put out a batch using the wrong kind of aluminum.

On a piston gun?

 

Impossible. Everything is fine. Carry on.

My first thought. Must be a shill poster from Colt

On a piston gun?

 

Impossible. Everything is fine. Carry on.

lol

On a piston gun?

 

Impossible. Everything is fine. Carry on.

You owe me a coffee.

 

 

you can see it is in two spots, however the closer spot in the pic is much more worn

Could be a bad heat treat.

i still dont see how metal got inside the upper from the latch... id disassemble your upper and degrease it and look for other wear spots or signs of carrier tilt. the metal inside has me more worried than the latch.

 

or you could just do as HE says and carry on because you have an unstoppable piston AR and it never needs service or lube and will run forever...

 

personally id go with option 1 then sell it and buy an BCM upper.

Before spending money on a fancy new CH, swap out one of your existing milspec CH from another rifle and fire a few rounds. That wear is definitely abnormal. It's as if something with the reciprocating action is forcing the CH too far forward. I find it really hard to see how shavings for that external piece if the CH got inside your upper. Check for other areas inside the upper or BCG that are showing areas or abnormal wear.

Before spending money on a fancy new CH, swap out one of your existing milspec CH from another rifle and fire a few rounds. That wear is definitely abnormal. It's as if something with the reciprocating action is forcing the CH too far forward. I find it really hard to see how shavings for that external piece if the CH got inside your upper. Check for other areas inside the upper or BCG that are showing areas or abnormal wear.

Thank you for some sanity!!!

Thank you for some sanity!!!

Are you insinuating that the other answers in this thread are somehow insane?

 

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Are you insinuating that the other answers in this thread are somehow insane?

 

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Welcome to the world of deductive reasoning.

You can't guess problems away. Inspection and deduction is how you fix things.

Welcome to the world of deductive reasoning.

You can't guess problems away. Inspection and deduction is how you fix things.

I don't know what crawled in your ass and died but did you read the rest of the thread?

 

I see plenty of qualifying questions by several members (none of which were YOU) before you added not the least bit to the OP's issue.

 

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Thank you for your eloquence.

OP, how did you make out? Out of spec upper or out of spec CH?

Bump. Update?

 

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Please stop cluttering the thread with DI vs piston babble. I have a DI AR too and there's plenty of other threads debating them.

 

 

Please stop trying to have an intelligent discussion. This is NJGF.

so did we ever find out what was wrong here?

Haven't gotten in touch with AA or messed with it since. I'll get to it.