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Thread: What is this part?

  1. #21
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    They are a must for a RR firing full auto 9mm. They are a good idea for a full auto RR. I can also see a use on a registered SBR receiver or any receiver that would be difficult to replace.

    FYI: Those pictured are the Gen I pins.

  2. #22
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    Quote Originally Posted by az doug View Post
    They are a must for a RR firing full auto 9mm. They are a good idea for a full auto RR. I can also see a use on a registered SBR receiver or any receiver that would be difficult to replace.

    FYI: Those pictured are the Gen I pins.
    I have heard the opposite about pistal caliber rifles as the KNS pins won't allow one to tell immediately if they break a pin.

  3. #23
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    Required along with a ramped bolt when firing 9mm in full auto. Egging out the holes WAS a problem folks and on the machine gun forums always warned about. KNS came up with a solution. Cheap insurance if you have a $14,000 registered M16.
    Glocks are functional tools and nothing else, hence they have no soul - Rob S.

  4. #24
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    +1 on ramping the bolts.

    DavePAL84, you bring up a good point. Having egged out the hammer pin hole in one of my RRs with an unramped bolt and a stock pin that broke, I installed KNS pins in both my RRs. I can "shotgun" the receiver and check the pins by trying to move the hammer around. I believe the KNS pins are more resistant to breakage, but can still break.

    I have since repaired the hammer pin hole and ramped my 9 mm bolts.
    Last edited by az doug; 06-16-10 at 01:47.

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