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Thread: Adjustable Gas Block with Picatinny Rail

  1. #1
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    Adjustable Gas Block with Picatinny Rail

    After hours and hours of searching I've been unable to find a steel adjustable gas block with a picatinny rail. Does anyone know of a company that makes them or knows of a company that's willing to modify a non adjustable gas block.

    I did find this but there isn't a picture and I've never heard of the company. http://hahntactical.com/index.php?ap...0m7gvjl5r0yndm

    I'm looking for an adjustable gas block because I'm a lefty and the rifle will be suppressed.

    Here's my rifle configuration:
    Colt Lightweight 6720
    DD 14.5" barrel with carbine gas system, will pin flashhider.
    Magpul SL handguard
    Will be suppressed with a Sig 762SRD QD
    I want to put a flip up front sight on the picatinny railed gas block. The gas block will be pinned or dimpled.
    I want to mount the front sight to the gas block/barrel for durability purposes.

    Gas Block Specs:
    The gas block will ultimately be pinned or dimpled.
    Steel or stainless steel
    Must be rail height
    Adjustable with detent locking screw. I've thought about taking the valve assembly out of an adjustable gas block and installing it in modified a non adjustable gas block.

    Thanks in advance

  2. #2
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    Why on earth would you want to rail mount anything to a gas block?

    If you're going to the time and expense of switching out a gas block, you'd be much better off switching out the handguard at the same time to something longer and rolling with a regular low pro adjustable from SLR or the like. That way you can mount whatever you want to the handguard and not have to worry about direct heat from contact with the gas block.
    Last edited by The Rat; 11-06-18 at 08:02.

  3. #3
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    Do you have a 6720 upper now?

    Is the DD barrel being built into a second dedicated suppressed upper?

    The pinned FSB that comes on the 6720 sounds like the best fit for your stated requirements.

    A little more info would be helpful.

    Quote Originally Posted by lee1000 View Post

    Here's my rifle configuration:
    Colt Lightweight 6720
    DD 14.5" barrel with carbine gas system, will pin flashhider.
    Magpul SL handguard
    Will be suppressed with a Sig 762SRD QD
    I want to put a flip up front sight on the picatinny railed gas block. The gas block will be pinned or dimpled.
    I want to mount the front sight to the gas block/barrel for durability purposes.
    Black River Tactical
    BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
    BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
    BRT Bolt Carrier Groups M4A1, M16 CHROME
    BRT Covert Comps 5.56, 6X, 7.62

  4. #4
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    Quote Originally Posted by The Rat View Post
    Why on earth would you want to rail mount anything to a gas block?

    If you're going to the time and expense of switching out a gas block, you'd be much better off switching out the handguard at the same time to something longer and rolling with a regular low pro adjustable from SLR or the like. That way you can mount whatever you want to the handguard and not have to worry about direct heat from contact with the gas block.
    I figure it's more repeatable. If the sight is mounted on a handguard and the handguard is bump the front sight might be off. It's only aluminum. Just about every military rifle I can think of has the sight afixed to the barrel.

  5. #5
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    Quote Originally Posted by Clint View Post
    Do you have a 6720 upper now?

    Is the DD barrel being built into a second dedicated suppressed upper?

    The pinned FSB that comes on the 6720 sounds like the best fit for your stated requirements.

    A little more info would be helpful.
    No, I'm modifying the Colt upper.

    I just put a Aimpoint on it so I'm looking for flip up sights.

  6. #6
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    Adjustable Gas Block with Picatinny Rail

    Duplicate

  7. #7
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    Quote Originally Posted by lee1000 View Post
    No, I'm modifying the Colt upper.

    I just put a Aimpoint on it so I'm looking for flip up sights.
    Is there not enough material to create a shoulder?
    If not, id leave it 16 at first and go from there.

    That said, if you want robust irons, keep the fsb. A flip sight on a gas block is backwards.

  8. #8
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    If you must have a folding sight get one of these and either Clint's port kit or tube kit. Probably need to clearance the handguard to keep the sight off of it.
    Last edited by GH41; 11-06-18 at 15:19.

  9. #9
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    Quote Originally Posted by GH41 View Post
    If you must have a folding sight get one of these and either Clint's port kit or tube kit. Probably need to clearance the handguard to keep the sight off of it.
    Clint who?


    Thanks

  10. #10
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    Adjustable Gas Block with Picatinny Rail

    Quote Originally Posted by MegademiC View Post
    Is there not enough material to create a shoulder?
    If not, id leave it 16 at first and go from there.

    That said, if you want robust irons, keep the fsb. A flip sight on a gas block is backwards.
    I'm replacing the barrel because of the lack of shoulder if I were to cut the barrel down to 14.5.

    What do you mean by backwards? I'm open to suggestions

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