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Thread: auto BCG's on semi auto's

  1. #1
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    auto BCG's on semi auto's

    I've read here and there that using an auto BC has some benefit due to the additional mass and it seems that folks recommend the BCM BCG as the bolt is MPI'ed, the carrier and key is chromed where it needs to be, etc.

    I have a shopping cart filled with some goodies from Bravo Co. and among them is the BCM BCG, however reading though the Bushmaster catalog (I was bored) I came across the following;

    "The position of the Bureau of Alcohol, Tobacco, and Firearms (ATF) is that if your AR15 type rifle contains even one M16 component, it is a Machine Gun."

    Please advise.

    Thanks,

  2. #2
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    First of all, Hi Folks! First post over at this forum and I hope I can bring some insight and laughs here as well. This topic is the start of many long discussions on many websites. While reading and understanding what you are saying, the ATF also acknowledges that many US companies use full auto carriers in their new rifles and doesn't have a problem with it. If they did, Bushmaster and LMT to name a few would be in deep #@$%. It only becomes a problem with the ATF when the gun malfunctions and goes full auto with selected FA parts and now you are in possession of serious contraband. I have a full auto bolt carrier (enhanced) in my LMT namely because it's a SBR (14.5"). Does the added mass of a FA bolt carrier make a difference, couldn't tell you but it makes me feel better.

  3. #3
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    i purchased a lmt back up bcg in semi, they were out of the full auto. i'm by far an expert but the only thing i've noticed is with the full auto bcg the casings are slung behind me, with semi they go 90 deg. full auto is colt btw and i dont recall which extractor set ups they have. pretty sure the lmt is the black plug with the o ring, not sure about the colt.
    "Unfortunately 87.26% of the quotes and statistics on the internet are lies." - Abraham Lincoln
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    Quote Originally Posted by Watchman View Post
    "The position of the Bureau of Alcohol, Tobacco, and Firearms (ATF) is that if your AR15 type rifle contains even one M16 component, it is a Machine Gun."

    Please advise.
    The short answer is that no, having a full-auto carrier does not make your semi-auto AR15 a machine gun, nor does it violate any laws.

    With that said, I'd recommend going with a full-auto carrier for the reasons you previously mentioned. Whether or not you want to go the "enhanced" route is up to you. Most say that it makes no difference, but I can't say from personal experience.
    Best Regards,
    28_days

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    Quote Originally Posted by 28_days View Post
    The short answer is that no, having a full-auto carrier does not make your semi-auto AR15 a machine gun, nor does it violate any laws.
    .

    hold on there friend, there are SOME STATES that still have that law on the books, so please do not make such a broad statement, someone in a "ban" state may take that as the correct answer, thus violating the law unknowingly !

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    I was unaware that it was on the books anywhere. TOS treats it as an urban myth. Not that I don't believe you, but do you have any links? It'd be interesting to read.

    If it is indeed "illegal" in some states it surprises me that manufacturers would knowingly offer it without a disclaimer. There are several manufacturers that use the full-auto carrier exclusively.
    Best Regards,
    28_days

  7. #7
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    Exactly which laws are you referring to? IIRC, this has been clarified before and there was a letter from BATFE whcih stated that it is not expressly prohibited as long as the weapon does not fire more than 1 shot every time the trigger is pulled.

    Quote Originally Posted by OldNavyGuy View Post
    hold on there friend, there are SOME STATES that still have that law on the books, so please do not make such a broad statement, someone in a "ban" state may take that as the correct answer, thus violating the law unknowingly !

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    ...and I have read on here several times that the main thing you cant have is a fire control group that is full auto.

    The bolt and carrier group is not part of that fire control group.

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    E-mail me for a copy of the official memo regarding the ATFs position on the legality of Full Auto BCGs. Basically it states that as long as a part does not cause a weapon to fire full auto it is legal even if the part is intended for a machinegun.
    Last edited by Stephen_H; 07-10-08 at 08:49.

  10. #10
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    This silly arguement is beneath this site, and a perfect topic for TOS.
    "You people have too much time on your hands." - scottryan

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