Ar15 ejection problem

[SudoNoob]

Hmmm. BCG looks legit and quality specs. Upper is lower priced but looks very nice...

Are you using the correct carbine buffer tube, buffer weight and buffer spring?

Yes, carbine buffer tube and carbine buffer spring. Stock buffer weight but when I got home I put an H buffer weight to see if that changes anything. Haven't gone shooting yet to test it though.

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[ar15barrels]

Someone like Randall will be along eventually with more knowledge for you.

There is too little information presented to make an analysis just yet.
Need to look at the gas port size and some of the fired 5.56 cases.

A dramatically oversized gas port and weak 223 ammo can cause this behavior.

[Pofoo]

Still a new gun, right?
How many round have you shot? May need a little break in.
Do the rounds that don't function correctly have any scratches that the others don't?
Clean and inspect the chamber, and lube up bcg.
Take out the bcg and see if the Federal fully seats in the chamber without sticking.
Federal is usually pretty good stuff, but it could be a little out of spec.

[nedro]

Is it repeatable? 223 good 556 bad, back to 223 good and 556 bad again?
Or did you stop shooting after the 556 would not work?

[nedro]

Have you since fired it since putting the ammo that was causing issues through it? Results? Im suspecting possible gas block drift

I was thinking adjustable gas block set screw popped out.
But WAY too little info so far.

[SudoNoob]

Still a new gun, right?
How many round have you shot? May need a little break in.
Do the rounds that don't function correctly have any scratches that the others don't?
Clean and inspect the chamber, and lube up bcg.
Take out the bcg and see if the Federal fully seats in the chamber without sticking.
Federal is usually pretty good stuff, but it could be a little out of spec.

Yeah, only got 300 rnds so for. Didn't check the casings but I will when I shoot it again. And I'll give all the other suggestions a try. Thank you

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[SudoNoob]

Is it repeatable? 223 good 556 bad, back to 223 good and 556 bad again?
Or did you stop shooting after the 556 would not work?

Repeatable

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