FTE issue

[TheBelly]

Not to be contrary, Ray, but the body of the brass in the pictures looks pretty rough.

OP: you dint need to send it all the way back to the manf for a gas block. There are several local/semi-local folks that will do it for you for a good price.

[DenverGP]

body of the brass in the pictures looks pretty rough.

I'll try to get some side by side shots of unfired and one of the jammed cases. Looking at a spent case and a new unfired round out of the box, I don't see much difference, and thats with my bright work-lamp and reading glasses on. My camera tends to really exaggerate any surfaces too. something about the macro setting.

you dint need to send it all the way back to the manf for a gas block. There are several local/semi-local folks that will do it for you for a good price.

I'll see what the manf has to say, and then look into my options. Would it need an adjustable gas block? Or can the gas block just be drilled with a smaller hole to reduce the gas?

I have done a little digging learning more about similar issues, and more about the ar parts in general.

I checked my extractor, it has a spring and an o-ring, but I see a lot of comments that the o-ring is only needed if the extractor isn't firm enough to start with, and some comments that suggest on a carbine length system shouldn't be needed.

Also, noticed my BCG is a "full auto" or "m16" cut, where the top and bottom of the tail are cut to the same length. I saw some comments that the m16 cut can help since it increases the weight of the bcg, giving pressure a little more time before it tries to extract the round.

[Great-Kazoo]

Not to be contrary, Ray, but the body of the brass in the pictures looks pretty rough.

OP: you dint need to send it all the way back to the manf for a gas block. There are several local/semi-local folks that will do it for you for a good price.

It's Plan B. However on any new firearm, the mfg should handle the problem. Why pay out of pocket? Granted it would be quicker. Myself i'd polish that chamber then road test it. OR try some Federal or other brass stuff.

[TheBelly]

the manufacturer can't make a gas port smaller.

[DenverGP]

It's Plan B. However on any new firearm, the mfg should handle the problem. Why pay out of pocket? Granted it would be quicker.

Yup, hoping they'll be able to deal with it quick.

Myself i'd polish that chamber then road test it. OR try some Federal or other brass stuff.

I am thinking of giving that a try. Whats the best way for a beginner to do a light chamber polish? I've seen the suggestion of a chamber mop with a little flitz mentioned. I want to go minimal on whatever I do, rather than noob it up and create a new problem.

I do wish I had tried some other ammo before giving up for the day. I'll do a little polishing / more aggressive cleaning and try another ammo in the next day or so.

[DenverGP]

Myself i'd polish that chamber then road test it.

Great advice, and it solved the issue 100%. I had previously cleaned the chamber with the chamber brush and some mineral spirits before the first outing. I got a callback from the gunsmith at Kentucky Gun Co, he agreed that a light polish would be a good thing to try. I picked up some #0000 steel wool, and wrapped a little around the chamber brush. Chucked the cleaning rod into my cordless drill, and did about 20-30 seconds at low to mid speed, then blasted it with air to blow out any bits of the wool, sprayed some brake cleaner to flush everything, then did a normal cleaning and relube.

Took it out today, ran about 100 rounds without a single issue.

Thanks to everyone for the suggestions and things to check.

[ray1970]

Not to be contrary, Ray, but the body of the brass in the pictures looks pretty rough.

Yeah. I guess I didn't really look at the pictures. Looking again they do look a little rough. Especially back near the base of the case.