Extractor interchangeability ?

[Armorydoc]

I'm going nuts trying to find info on whether a type II extractor will work in a type I bolt. Because I'm playing heck trying to find a type I extractor. Can someone with experience offer some help ? Thanks.

[VASCAR2]

The Type I and Type II extractors are different in the length of the shaft. Black Rifle Arms has 7.62x39 extractors in stock. If it were me I’d buy two just to have another spare. It looks like BRA x39 extractors are in stock. Forum members have had good luck with 6.5 Grendel BRA extractors.


https://www.blackriflearms.com/AR-15-762...p_429.html

[Armorydoc]

The Type I and Type II extractors are different in the length of the shaft. Black Rifle Arms has 7.62x39 extractors in stock. If it were me I’d buy two just to have another spare. It looks like BRA x39 extractors are in stock. Forum members have had good luck with 6.5 Grendel BRA extractors.


https://www.blackriflearms.com/AR-15-762...p_429.html

Thanks for the help Vascar2 but I really need type I as I have a .264 LBC for the Black Hole Weaponry barrel. Not many out there for type I.

[FRB6.5]

The 7.62x39 extractor is the same as the Type I, they use that bolt.

You can see the BHW reseller lists the BCG as being for both as well:
https://www.surplusammo.com/products/saa...plete.html

[lazyengineer]

The Type I and Type II extractors are different in the length of the shaft. Black Rifle Arms has 7.62x39 extractors in stock. If it were me I’d buy two just to have another spare. It looks like BRA x39 extractors are in stock. Forum members have had good luck with 6.5 Grendel BRA extractors.


https://www.blackriflearms.com/AR-15-762...p_429.html

well..... I ordered 3, and 2 are already broken. So... not everybody is having the best of luck with BRA. I did send them a note today in fact about it, but haven't heard anything back. I ordered 2 more from Alexander Arms today (they aren't too bad in price; at $20 each). I thought about ordering a 10-pack of the things from Red-X arms; knowing full well those are likely cheap junk; but considering my twice-the-price BRA extractors are breaking as fast as they are - does it matter?

[VASCAR2]

You shouldn’t be breaking extractors that fast. You’ve got another problem. Your barrel might be over gassed, to hot a load or the receiver is not square where the bolt is not aligning square with the barrel extension. What barrel length, gas port size/location and buffer tube/spring/buffer are you using?

[lazyengineer]

You shouldn’t be breaking extractors that fast. You’ve got another problem. Your barrel might be over gassed, to hot a load or the receiver is not square where the bolt is not aligning square with the barrel extension. What barrel length, gas port size/location and buffer tube/spring/buffer are you using?

Probably so. Barrel is well aligned with extension (sights all light up naturally, and lapping didn't do much as had a pretty uniform wear pattern when tried it). Brass is throwing to about 3:00, so doesn't appear to be over-gassed. That said, it is an adjustable carbine length gas system, so I might start playing with that all the same.

Also, I do have to give props to BRA. They responded in less than 1 business hour, sending out replacement extractors for free (i did not demand this btw); and with a note suggesting same - that I may be over-gassed.

I was hoping just removing the O-ring, which folks said would fix it, would fix it. And I was hoping lapping the upper, which folks would say fixes it, would fix it. Neither of those helped. So next step is to start adjusting the gas-setting. I hate doing that though, since the gun runs 100% reliable otherwise. But, here we are.

[Armorydoc]

The 7.62x39 extractor is the same as the Type I, they use that bolt.

You can see the BHW reseller lists the BCG as being for both as well:
https://www.surplusammo.com/products/saa...plete.html

Thank you very much for that. I thought that was the case was wasn't 100% confident. I can find those. Thanks again.

[lazyengineer]

Probably so. Barrel is well aligned with extension (sights all light up naturally, and lapping didn't do much as had a pretty uniform wear pattern when tried it). Brass is throwing to about 3:00, so doesn't appear to be over-gassed. That said, it is an adjustable carbine length gas system, so I might start playing with that all the same.

Also, I do have to give props to BRA. They responded in less than 1 business hour, sending out replacement extractors for free (i did not demand this btw); and with a note suggesting same - that I may be over-gassed.

I was hoping just removing the O-ring, which folks said would fix it, would fix it. And I was hoping lapping the upper, which folks would say fixes it, would fix it. Neither of those helped. So next step is to start adjusting the gas-setting. I hate doing that though, since the gun runs 100% reliable otherwise. But, here we are.

To follow-up on this part - my adjustible gas-block is frozen. So I took it to the range today and ran about 60 rounds of brass reloads through it to warm it up, which didn't work, and it's still frozen. But the brass ejection pattern is text-book perfect 4:00 - suggesting it's not overgased. I ran 40 rounds of Wolf Steel, again, with no problems about about the same ejection pattern.

So I'm not sure if it really is overgassed afterall, but it's not proving very easy to adjust if so! If I have to, I can probably pull the handguards off to get to it better, hit it with a torch, and try to open up the set screws some more - but I don't really want to, and am not seeing a brass ejection pattern to suggest that's needed. I have two Alexander Arm's extractors on the way; and will install one of those. If it still breaks with that one, then I'll know for sure it's just a bad run of BRA extractors.

[VASCAR2]

You might try Kroil penetrating oil on your adjustable gas block screws. Another option might be PB Blaster which can be found in hardware or auto parts stores.

[KZero]

To follow-up on this part - my adjustible gas-block is frozen.

[video=youtube_share;wNzl7oB3Ge0]https://youtu.be/wNzl7oB3Ge0[/video]

[sundowner]

Great video thanks for the info .