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Thread: Mk18 mod 1 / CQBR build please advise

  1. #1
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    Mk18 mod 1 / CQBR build please advise

    So I attempting to put together a Mk18 mod 1 that is as close as possible to the rifle that is in service. Mind you this is my first AR.. So far I have the following items:

    Colt lt6720-R
    DD Mk18 RIS II rail
    Lmt fde sopmod stock
    Black A2 pistol grip
    Kac taupe front flip up sight
    Kac 200-600m buis
    Kac combat trigger guard
    Cqd sling plate and sling
    Tango down fore grip

    Next on the list will be a colt 10.3 barrel and kac flash hider. Besides optics, lights, and lasers is there anything that I need to consider changing or modifying? I belive that the colt low profile gas block
    Last edited by Bkostka; 03-20-12 at 13:41.

  2. #2
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    Might be a dumb question, but, you do already have your NFA tax stamp?
    "To preserve liberty, it is essential that the whole body of people always possess arms..."
    - Richard Henry Lee, 1788

  3. #3
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    No offense, but this is a quantum leap for a first AR. Many people say that your first rifle should not be a SBR.

    Other than that, your parts list seems to be in order for a clone that is very up to spec.
    "We are oft to blame in this / 'Tis too much proved -- that with devotion's visage / And pious action we do sugar o'er / The devil himself."
    Μολὼν λαβέ | NRA Lifetime Member

  4. #4
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    Taxes stamp is in the works. Plan to set up a trust in a few weeks and submit my form 1. I have read the different opinions on here as far as the SBR being a first, I'm not to worried. The rifle has a 16 inch barrel that I can shoot till my form clears. The build is a tall order and is costing me a lot. I think it's worth the money and the trouble.
    Last edited by Bkostka; 03-19-12 at 17:49.

  5. #5
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    Unless you are dead-set on an exact clone, I would consider an upper receiver group that is already built. Daniel Defense sells a nice 10.3 inch Mk 18 URG. Let the experts build it for you.

  6. #6
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    If you are insistent on sticking with Colt parts for authenticity, SAW has complete factory Colt Mk18 Mod 0 uppers. You can just shave the FSB and install the RIS II and not muck with the gas ports.

    Arguably you can substitute a Surefire/BE Meyers 215A for the KAC flash hider, as Surefire won the most recent SOCOM contract for suppressors. It isn't as short as the KAC flash hider though.

    That said, Noveske and DD offer factory Mk18 uppers with the RIS II. The DD has a 10.3" barrel, whereas the Noveske is a 10.5" My Noveske Mk18 runs and runs and runs...
    Last edited by JSGlock34; 03-19-12 at 20:42.

  7. #7
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    Need to get the Crane etching on the magwell.... and the KAC NT4 QDSS Suppressor

    High Caliber Sales does really awesome MK18 clones... Crane, KAC, Colt, and LMT parts....
    Last edited by Reagans Rascals; 03-19-12 at 20:57.
    When you can't make them see the light, make them feel the heat.. - Ronald Reagan

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  8. #8
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    Quote Originally Posted by Devilneck View Post
    Unless you are dead-set on an exact clone, I would consider an upper receiver group that is already built. Daniel Defense sells a nice 10.3 inch Mk 18 URG. Let the experts build it for you.
    Mine had extraction issues right out of the box, BCM extractor upgrade fixed it. If I were to do it again I'd have bought a Colt 10.3 upper and did the conversion myself.

  9. #9
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    Well I already have a base rifle and I'm trying to keep it as close as I can to the real navy issued ones. I'm a inspector in a machine shop so boring out the port hole at those tolorense is no problem. We hold tolorences + or - .001. Not to be rude but I was looking for suggestion to what I already have and if I missed any parts. I believe that the only thing I will be missing is a badger gas block. But my colt block is already a low profile one. I went with the colt lt6720 r because it would be cheaper then the specialized armerment rifle and has the proper roll marks. As far as engraving magwell that's a toss up. Haven't seen any military photos with it to justify doing it. Tuff choice cause I do like it. Again I'm not interested in off shoot uppers. Colt is the path i have chosen. Thanks for the many responses!
    Last edited by Bkostka; 03-19-12 at 22:29.

  10. #10
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    As for suppressor's I think Im going to go knights. Surefire looks like a nice option but no pics to confirm what they are going on. I believe AAC also got a contract. But not 100 percent sure if they are used on mk18's. Only thing I have read is navy seals got AAC cans on there new Hk45ct. Not so sure about rifles.
    Last edited by Bkostka; 03-20-12 at 08:17.

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