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Thread: Colt MT6400C vs. Colt 6920

  1. #31
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    Why are you worried about a 14.5" barrel on a 6920?

    The 6921 is the 14.5" barrel version.

  2. #32
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    Quote Originally Posted by rob_s View Post
    Why are you worried about a 14.5" barrel on a 6920?

    The 6921 is the 14.5" barrel version.
    It's not that, sorry for the confusion...
    I can't get a straight asnwer from the local shops about me, a Civilian, purchasing a 6920 which from Colt is marked LE Gov't use...
    Even the lady at ATF in Charlotte told me she would have to call me back. I am aware of the 200 registration/tax/fee for a barrel under 16" but with the markings on the rifle I can't get a straight answer yet. We have a grat class III dealwr but he is ata gun show and I can't reach him until next week.

    Colt told me yesterday that they keep those marking for the 7 states that kind of have their own state laws that are very similar to the ban laws. And that I should be able to buy the LE6920 which is the one I want.

    Any clarrification from anybody who works for a dealer would be awesome, I have been reading off of ar15.com for almost 3-4 hours in the past 2 days...

  3. #33
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    If you can buy a new production Bushmaster you can buy a 6920. The markings on the receiver are irrelevent.

  4. #34
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    Quote Originally Posted by rob_s View Post
    If you can buy a new production Bushmaster you can buy a 6920. The markings on the receiver are irrelevent.

    That's what I thought but local shops are telling me different,

    Is it worth getting a 5.56 versus a .223rem? I mean the barrel marked as 5.56 w/the lower...

  5. #35
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    Quote Originally Posted by Greenbean View Post
    That's what I thought but local shops are telling me different...
    Find a different shop.

  6. #36
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    Quote Originally Posted by ChrisG19 View Post
    Find a different shop.
    I did, thanks...
    Talked with a smaller but down-home awesome one at lunch,
    He set me straight, even got out his book and made three or four calls looking to find me a supplier with a 6920, he found 7 6921, which I might conside b/c I can't imagine getting ahold of the grenade launcher but who knows.

    Then he told me that if I can get the 2yd ol Match Target m4 for the price I told him, then get IT.
    he told me he sold a 10 yr old barely shot 6400 for 200 more then what I am getting this one for.

    I like honest folks...

  7. #37
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    Quote Originally Posted by M4arc View Post
    The 6400c comes with the cut down, neutered style bolt carrier whereas the 6920 will come with an M16 carrier.
    Anyone got any pics of the differences,
    I can access the pic from Bushy web-site for the A3M4 parts diagram but don't know what the 6400 part would look like.
    http://www.bushmaster.com/electronic...ematic2007.pdf

  8. #38
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    Quote Originally Posted by Greenbean View Post
    Anyone got any pics of the differences,
    I can access the pic from Bushy web-site for the A3M4 parts diagram but don't know what the 6400 part would look like.
    http://www.bushmaster.com/electronic...ematic2007.pdf
    unshrouded older Bushmaster AR15 carrier, RRA 'enhanced' AR15 carrier, Colt M16 carrier.



    The MT carrier is like one of these below.

    Here's two 1/2 circle Colt carriers.
    My 3gun rifles carrier, it's a Colt 1/2 circle unshrouded carrier. It's light for less recoil. The barrel is a midlength and I use an Enidine buffer w/standard power CAR buffer spring. Less moving mass = less felt recoil & muzzle lift.


    My wifes 3gun'ish rifle Colt 1/2 carrier, shrouded firing pin.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

  9. #39
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    Quote Originally Posted by gotm4 View Post
    The MT carrier is like one of these below.
    WOW, thats significant,
    So to help a new guy out, can you explain why they would do that and if I wait and get the 6920 from Colt, it will have the M16 style carrier, right.

    Does the one in the 6400 look like the AR15 or the enhanced version.

    Thanks for the help,

  10. #40
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    Quote Originally Posted by Greenbean View Post
    WOW, thats significant,
    So to help a new guy out, can you explain why they would do that and if I wait and get the 6920 from Colt, it will have the M16 style carrier, right.

    Does the one in the 6400 look like the AR15 or the enhanced version.

    Thanks for the help,
    I believe the newest ones I've seen from Colt in their commercial rifles were shrouded but still 1/2 circle. Yes, the 6920 has a M16 carrier.

    Commercial Colt is kinda weird, they do a combination of things so that you can't add an auto sear or M16 FCG parts and mil-spec sized pinned uppers on to their lowers. These things are different (larger) hammer and trigger pins, hardened block above the safety, and large pivot pin uppers.

    If you want an M16 carrier you can buy one and just add it to a 6400 if you don't have the lower receiver block in it, and either sell or just use the 6400s carrier in another rifle build. Some full circle carriers will still work even with the block in the lower. The RRA has a bit longer section at the tail and may not fit. If you do run a M16 carrier it's wise to get a non-notched AR15 hammer (these are available from DPMS).
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

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