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Thread: HK Trigger Groups

  1. #11
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    Quote Originally Posted by Iraqgunz View Post
    So it would be safe to say that unless you already own a select fire HK of some sort, these things are basically useless?

    The main thing is that I was under the impression that full auto trigger packs like this were somehow registered. I don't know enough about all the HK/NFA intricacies so that's why I am asking.

    If you have a HK 94/93/91 and want to turn it into a legal machine gun, you need to buy one of the registered HK sears out there and then send it to someone to be installed. Those sears have a serial number and are considered the machine gun.

    Those trigger packs can't be used to legally convert a semi auto HK into a legal, transferrable full auto.
    Employee of colonialshooting.com

  2. #12
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    If you have a registered receiver hk machine gun you can buy those trigger packs and put them in no problem and be perfectly legal.

    If you have a registered sear, you can send the sear to a HK gunsmith and have them install it into the trigger pack of your choice, and they will keep the sear that comes with the trigger pack (as it is an unregistered sear).

    If you have a semi auto host gun you can't buy those and have them together as you can manufacture a unregistered machine gun with them (since there is a unregistered sear inside of the trigger pack).

    Those trigger packs listed are useless because it is illegal to possess them if you have a semi auto hk or hk clone. Not to mention it will not fit because of the shelf in semi auto hk's and lack of the push pin hole.

    The term "clipped and pinned" is a cosmetic modification done to trigger packs to make it seem that a semi auto hk has the look of a push pin swing down HK. This modification does nothing to allow select fire or anything like that. Adding a Paddle mag release, when done wrong can constitute making a machine gun because you can drill a hole into the receiver allowing the possibility of full auto trigger pack.


    Also I had a very long and interesting conversation with the ATF Technical branch a year and a half ago regarding the Sear caliber. According to the ATF a Sear does not have a caliber. Ads that list "Sear is registered in 223, 308 and 9mm" is wrong as the sear itself does not have a caliber. My form 4 says "Machine Gun Sear" BBL Length: NA Caliber: NA Overall Length: NA
    Last edited by Ak44; 03-10-11 at 23:55.
    "There are only two kinds of people that understand Marines: Marines and the enemy. Everyone else has a second-hand opinion." — Gen. William Thornson, U.S. Army

  3. #13
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    If it will not fit a semi auto gun why would it be illegal to have it and the semi auto? It sounds like it would take machining to make it work in the semi.
    "Real men have always needed to know what time it is so they are at the airfield on time, pumping rounds into savages at the right time, etc. Being able to see such in the dark while light weights were comfy in bed without using a light required luminous material." -Originally Posted by ramairthree

  4. #14
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    Quote Originally Posted by usmcvet View Post
    If it will not fit a semi auto gun why would it be illegal to have it and the semi auto? It sounds like it would take machining to make it work in the semi.
    Theortically, you can take the sear out of the full auto pack and you can put it in a semi pack.

    A HK smith will cut a full auto trigger group and weld it to accommodate the shelf in a semi auto.
    Last edited by Ak44; 03-11-11 at 17:16.
    "There are only two kinds of people that understand Marines: Marines and the enemy. Everyone else has a second-hand opinion." — Gen. William Thornson, U.S. Army

  5. #15
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    Thanks AK. I'm tracking now.
    "Real men have always needed to know what time it is so they are at the airfield on time, pumping rounds into savages at the right time, etc. Being able to see such in the dark while light weights were comfy in bed without using a light required luminous material." -Originally Posted by ramairthree

  6. #16
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    Quote Originally Posted by Ak44 View Post
    If you have a registered receiver hk machine gun you can buy those trigger packs and put them in no problem and be perfectly legal.

    If you have a registered sear, you can send the sear to a HK gunsmith and have them install it into the trigger pack of your choice, and they will keep the sear that comes with the trigger pack (as it is an unregistered sear).

    If you have a semi auto host gun you can't buy those and have them together as you can manufacture a unregistered machine gun with them (since there is a unregistered sear inside of the trigger pack).

    Those trigger packs listed are useless because it is illegal to possess them if you have a semi auto hk or hk clone. Not to mention it will not fit because of the shelf in semi auto hk's and lack of the push pin hole.

    The term "clipped and pinned" is a cosmetic modification done to trigger packs to make it seem that a semi auto hk has the look of a push pin swing down HK. This modification does nothing to allow select fire or anything like that. Adding a Paddle mag release, when done wrong can constitute making a machine gun because you can drill a hole into the receiver allowing the possibility of full auto trigger pack.


    Also I had a very long and interesting conversation with the ATF Technical branch a year and a half ago regarding the Sear caliber. According to the ATF a Sear does not have a caliber. Ads that list "Sear is registered in 223, 308 and 9mm" is wrong as the sear itself does not have a caliber. My form 4 says "Machine Gun Sear" BBL Length: NA Caliber: NA Overall Length: NA
    This. This guy knows his shit.

  7. #17
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    Top is a Full Auto Trigger Pack, one that you would see in a Actual HK MP5 or G3 or whatever (ie Swing down lower), Bottom is a modified FA Trigger Pack to fit in a Host Gun/Semi Auto that has a Shelf



    Top is a G3 Trigger Housing, Bottom is a HK91 Trigger Housing. (Notice the HK91 housing does not have "ears" like the G3 housing to allow a push pin).



    This is the "shelf" that is found on semi auto/civilian HK94/91/93/SP89. The shelf protrudes to disable the attachment of the Full Auto Trigger Packs. A real HK machinegun/subgun will not have a shelf and will have a hole where a pushpin/takedown pin would go.



    This is a Clipped and Pinned MP5 SEF Trigger Group. It gives the appearance of a Push Pin/Take Down pin that is standard on a true swing down lower HK Machine gun/Sub gun. The Trigger pack inside is a semi auto trigger pack from an HK94 but it sits in a SEF trigger housing.



    Another view of the Clipped and Pinned Trigger group. It has a space for the shelf to enter, and the pin is not an actual full pin. Again the Clipped and Pinned modification does nothing to enable or disable the use of Full Auto. It just gives the cosmetic appearance of a swing down HK.
    Last edited by Ak44; 03-11-11 at 20:11.
    "There are only two kinds of people that understand Marines: Marines and the enemy. Everyone else has a second-hand opinion." — Gen. William Thornson, U.S. Army

  8. #18
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    great photo illustration AK44.

    Standard unmodified HK trigger frames are unrestricted parts that are legal to be bought and sold by anyone. It is mechanically impossible to install them on a semiauto HK receiver unless the steel trigger frame itself is modified by machining off the anterior/inferior portion of the trigger frame to allow it to fit on the semiauto HK 9x receiver "shelf".

    These unmodified trigger frames are just parts, in the same way that fullauto SIG 55x lowers are legal for unrestricted sale.
    Last edited by JoshNC; 03-11-11 at 20:16.

  9. #19
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    Iraqgunz going back to the original question (I feel I got carried away), those parts listed are legitimate in the essence that they are just parts. Those trigger groups contain a sear in order to make a gun run full auto but they are unregistered thus illegal to own with a semi auto gun unless you have a registered receiver gun. A registered sear has a serial# etched in them and go for at least $10,500. Fleming, S&H, and Qualified are the name of the sears that are registered. Fleming and S&H I believe are the exact same and were made at the exact same time and at the exact same place. But Fleming is a more desirable name for some reason. Hope this helps, and I hope we didn't drag this thread out longer than it had to be.
    Last edited by Ak44; 03-11-11 at 20:20.
    "There are only two kinds of people that understand Marines: Marines and the enemy. Everyone else has a second-hand opinion." — Gen. William Thornson, U.S. Army

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