AR308 Tight Extractor - Page 1

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[ARCHIVED THREAD] - AR308 Tight Extractor

Posted: 5/22/2017 10:58:02 AM EDT

Hey All,

If I have an extractor that is tight and really biting into brass cases and sometimes causing an FTE/FTF, Will this wear-in after a few hundred rounds? Should I disassemble it and polish it? Do people shoot steel case ammo to help wear it in?

I shot IMI and MEN ball ammo and each varied and had the same behavior.

Posted: 5/22/2017 3:08:45 PM EDT

[#1]

properly made parts shouldnt really require a break in, as such i dont shoot steel to break in new parts.

so you are saying it has too much pressure on the claw end and isnt seating over the rim? if thats right, does it have an o-ring along with the extractor springs? maybe take the o-ring out, if that is the case.

or is the extractor claw actually made properly and fully able to fit over a rim?

Posted: 5/22/2017 5:30:44 PM EDT

[#2]

Quote History

Quoted:
properly made parts shouldnt really require a break in, as such i dont shoot steel to break in new parts.

so you are saying it has too much pressure on the claw end and isnt seating over the rim? if thats right, does it have an o-ring along with the extractor springs? maybe take the o-ring out, if that is the case.

or is the extractor claw actually made properly and fully able to fit over a rim?

View Quote

It does seat. When I have a cartridge in the chamber and I fire, sometimes on the backstroke the extractor is still gripped/biting into the case+rim and the ejector doesn't kick it all the way out, and then the BCG gets stuck going back into battery since I have an angled stovepipe sticking out.

Posted: 5/22/2017 7:39:50 PM EDT

[#3]

308 extractors commonly come with double o-rings. Take one out, and give it a try. I've also heard that DPMS Gen II extractors work great (and what I'll be using). They are drop in for any gen DPMS pattern bolt, have a redesigned claw angle, and do not use springs at all (uses elastomer bushing). They're not cheap, but have a fantastic rep for working well. Brownell's has them.

Posted: 5/23/2017 11:57:51 AM EDT

[#4]

Quote History

Quoted:

It does seat. When I have a cartridge in the chamber and I fire, sometimes on the backstroke the extractor is still gripped/biting into the case+rim and the ejector doesn't kick it all the way out, and then the BCG gets stuck going back into battery since I have an angled stovepipe sticking out.

View Quote

maybe a weak ejector spring then? kind of a pain to change but if you have a vise and small punch you can do it.

i've had a couple bad ejectors springs over the years, even on new bolts.

Posted: 5/24/2017 9:26:10 AM EDT

[#5]

Quote History

Quoted:
308 extractors commonly come with double o-rings. Take one out, and give it a try. I've also heard that DPMS Gen II extractors work great (and what I'll be using). They are drop in for any gen DPMS pattern bolt, have a redesigned claw angle, and do not use springs at all (uses elastomer bushing). They're not cheap, but have a fantastic rep for working well. Brownell's has them.

View Quote

I went down this route. I did indeed have two o-rings but took one out. It feels better when testing the ejector outside the gun, hopefully i have another range day this weekend.

I'm other news, holy carbon buildup Batman.

[ARCHIVED THREAD] - AR308 Tight Extractor

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