Clamp on low-pro gas block?

Discussion in 'AR-15 Discussion' started by ZeusEcho, Jul 26, 2012.

  1. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    It's for a 16" middy under a Centurion C4 10" rail.

    Looking at these 3 clamp on versions...any comments on them or other suggestions I should consider?

    Daniel Defense-9091
    VLTOR- GB-2C
    Syrac Ordnance- Click-Adjustable

    Thanks :)
     
  2. mountainman13

    mountainman13 New Member

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    Not familiar with them and the words clamp on kinda scare me but I'd damn sure go with the adjustable.
     

  3. GaMatt72

    GaMatt72 New Member

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    Well technically my YHM folding front sight gas block is a clamp on. The rings are separate.
     
  4. mountainman13

    mountainman13 New Member

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    I know enough to build or swap parts out of an AR. Don't own one yet and probably never will due to Obama. I'd love some more info on these. The words clamp on and gas block feel like they shouldn't be in the same sentence.
     
  5. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    LOL I'm building one now just for this ^^^ very reason!

    There are two types, clamp on and set screws on the bottom. I've read that the clamp on version is better because the clamp force is extremely large and spread over a larger surface between the block and barrel where as the set screw type tend to come loose.

    Clamp on-
    [​IMG]

    Set Screws-
    [​IMG]
     
    Last edited: Jul 26, 2012
  6. mountainman13

    mountainman13 New Member

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    Yeah I see plusses and minuses to both.
     
  7. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    What do you think the pluses to the set screw version are?
     
  8. mountainman13

    mountainman13 New Member

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    Direct connect to the barrel. But as stated its weakness would be the single screw. Perhaps I should design a double screw one and cash in. Lol
     
  9. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    I think they already have 2 screws :)
     
  10. mountainman13

    mountainman13 New Member

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    If that's the case that would definitely be my choice between the two.
     
  11. GaMatt72

    GaMatt72 New Member

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    image-3973091757.jpg

    My YHM GAS BLOCK SIGHT.
     
  12. Sniper03

    Sniper03 Supporting Member Supporter

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    Ninja,

    I would go with the Daniel Defense style low profile gas block I prefer the clamp type. Use some Blue Loctite on the Screws when installing. And torque the screws to around 20-25 inch lbs. Similar to torquing Scope Ring Screws. Also if I am correct on my thinking? The Rail should be over the top or very close when the rail is installed. This is great because it will protect the low profile gas block form contact with anything anyway.
    When I use the set screw type I remove one screw at a time when it is installed and mark the barrel use a center punch down through the screw hole. Put that screw back in and then remove the second screw and mark the same procedure. I then take the unit off and take a drill an make a depression on the barrel the same size as the screw tip where the screws contact. If they have pointed set screws the indents are smaller just to secure the screw tip. Then reinstall it and use Blue Loctite on the screws. GAMATT that is a good unit I have one on one of my ARs and have installed many!
    Just some ideas!

    03
     
  13. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    Thanks for the pointers man! Any tips on lining up the gas holes properly?
     
  14. Sniper03

    Sniper03 Supporting Member Supporter

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    You Bet!

    Before installing the Quad Rail and when you are installing the low profile gas block.
    Get a regular Large paperclip straighten it out all the way. Then put a 1/4 inch L shaped bend on one end of it. Insert the bend through the hole in the low profile gas block where the gas tube goes and down into the gas port hole on the barrel. Then tape the long end of the paper clip to your barrel until you are completely through doing the low profile gas block installation. This will guarantee that the gas port is not obstructed while you are working. Then remove the tape and the clip and WHALA! Gas port hole is functional.
    Don't forget to removethe wire from the low profile gas block so you can insert the gas tube! :p LOL!

    03
     
  15. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    Sounds like a good trick. I assume the holes need to be perfectly aligned to avoid partial obstruction right? How does the paper clip achieve this since it's a much smaller diameter than the gas holes?
     
  16. Sniper03

    Sniper03 Supporting Member Supporter

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    Ninja,

    One of he large paper clips are fairly close to probably the possible .062 gas port hole you may have in the 16in Car Length Barrel. Also the Gas Port inlet (Hole) in the Low Profile Gas Block is much larger than the Gas Port Hole in the barrel. So a large paperclip will work fine. Do not use one of those little small thin paperclips. You might not get a true alignment. The large ones usually have some rings cut around the wire the entire length, if you know which ones I am speaking of. :)

    03
     
  17. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    Got it thanks man!

    Now to get the damn A2 sight off. Those pins are not wanting to come out, and yeah I'm tapping/hitting them the right way, left to right. :)
     
  18. X-mark

    X-mark New Member

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    Nice rail! One of the best free float quad rails on the market!!! Any of the gas blocks you mentioned are quality pieces. Just pick the correct size for your barrel.
     
  19. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    Thanks for your input X-mark and ktmboyz. I went with the Danial Defense. Now to get the A2 sight off...ugh!