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Thread: Extractor spring / insert / ring - what is the latest wisdom?

  1. #11
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    Quote Originally Posted by gjj View Post
    I am not a gun expert. But, I am an engineer. The thought of needing a tool to compress the spring and O ring just so I can assemble my bolt does not sit well with me.

    Under this much tension, my suspicion would be that stress would be transfered to other areas in the extractor and extractor retaining pin that could cause these parts to fail.
    After the first time assembled the extractor springs will take a 'set'. You don't have to use tools you can use a counter/table top extractor face down and press on the bolt. Works a little bit mo' betta than tools.
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  2. #12
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    Quote Originally Posted by gjj View Post
    I have read through several of the huge posts on this topic. I purchased the extractor upgrade kit (crane o-ring, HD extractor spring, black insert).

    I found it impossible install all these simultaneously in my bolt. So, I tried just using the HD spring and black insert. It was still difficult to get the bolt reassembled without tools. My bolt had problems closing on rounds sometime. I was told that it would be fine after it was broken in. I want something that works from the beginning so I finally went to just the standard spring and black insert.

    What is the current wisdom on what works best for 16" carbines (some of the threads are old)?

    Should I be looking at adding a d-fender instead?

    You can read all the posts and still come away pretty confused on what is the best approach.
    What you experienced is 100% normal. Give the spring about 20 rounds to break in and you should be good after that. I would keep the O-ring out for at least 1k if you have experiencing issues.

    Where the problem lies is that not all extractors are created equal. Some of the "pockets" where the extractor spring and insert sit are not as deep as others.


    C4

  3. #13
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    I replaced my original Extractor spring with the Buffer Technologies Extractor Upgrade Kit (sourced from Brownells). It consisted of the spring, black insert and an O-ring.

    It fitted well, but after circa 1000 rounds the O-ring broke. The carbine was feeding well. I realised it was broken when I stripped it to clean it. The O-ring looked like it was pinched/cut/squeezed on the side(?).

    Does one need the O-ring, or can I run it just with the spring and the black insert? My AR was feeding well before I installed the 'Upgrade Kit'.

  4. #14
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    You my dear Sir are in the running for necropost of 2012. Keep your eyes on the boards for this years winner.

    No, you do not really need the O-ring. I consider the O-ring a crutch. If you have a good extractor spring and insert then you are good to go.

    Quote Originally Posted by Pivo View Post
    I replaced my original Extractor spring with the Buffer Technologies Extractor Upgrade Kit (sourced from Brownells). It consisted of the spring, black insert and an O-ring.

    It fitted well, but after circa 1000 rounds the O-ring broke. The carbine was feeding well. I realised it was broken when I stripped it to clean it. The O-ring looked like it was pinched/cut/squeezed on the side(?).

    Does one need the O-ring, or can I run it just with the spring and the black insert? My AR was feeding well before I installed the 'Upgrade Kit'.



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  5. #15
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    I think Iraqgunz hits the nail on the head. Good extractor spring really negates the need for the O ring I have found.

    I put the 5 coild Sprinco extractor springs in all my ARs, Carbine and Middy. It was a B**** to put in and my thumb hurt for a couple days. The tension is good, real good. For a while it generated very fine, micro brass flakes after pulling cases out with a vengeance. It seems to die down with time.

    Run a 5 coil and you won't have a problem.

  6. #16
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    Quote Originally Posted by Iraqgunz View Post
    You my dear Sir are in the running for necropost of 2012. Keep your eyes on the boards for this years winner.

    No, you do not really need the O-ring. I consider the O-ring a crutch. If you have a good extractor spring and insert then you are good to go.
    Thanks for the answer guys.

    PS. I have searched this site with numerous selection criteria, but I didn't get the exact answer to my question. Now I have it.

  7. #17
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    Quote Originally Posted by Pivo View Post
    Thanks for the answer guys.

    PS. I have searched this site with numerous selection criteria, but I didn't get the exact answer to my question. Now I have it.
    .........Pivo, thanks for asking the question,,,I also wondered the same, with new people coming aboard and technology ever changing,,I'm sure your post was well received...Most will give you a fair answer,,but there is always the "pompous sarcastic" reply.....

  8. #18
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    Quote Originally Posted by Iraqgunz View Post
    You my dear Sir are in the running for necropost of 2012. Keep your eyes on the boards for this years winner.

    No, you do not really need the O-ring. I consider the O-ring a crutch. If you have a good extractor spring and insert then you are good to go.
    Gotta agree with this.

    If you have a good spring(BCM spring and insert) the ) O-ring should not be needed.

  9. #19
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    Quote Originally Posted by Iraqgunz View Post
    You my dear Sir are in the running for necropost of 2012. Keep your eyes on the boards for this years winner.

    No, you do not really need the O-ring. I consider the O-ring a crutch. If you have a good extractor spring and insert then you are good to go.

    Oh. Shit.







    P.S.: He gives good advice.
    Last edited by BufordTJustice; 05-28-12 at 05:20.

  10. #20
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    It's generally accepted that carbines need more extractor tension than the original M16, and it's also generally accepted that the o-ring and extra power extractor together are usaully too much.

    We use a rifle extractor and O-ring on our rifles. We believe the O-ring has a longer service life than an extractor spring alone, while giving the increased extractor tension needed.

    For a duty or defensive carbine it's also important to change the extractor spring based on a round count, not failure to extract.

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