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  1. #1
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    Mar 2009
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    Adjustable BCG Gas Key by Sun Devil Mfg.

    Sun Devil Mfg. has introduced the ADIGS (Adjustable Drop-In Gas System) an adjustable gas key for any Direct Impingement AR-15 or AR-10's. The ADIGS is available as a stand alone piece for $59.95 or installed on a BCG for $119.95.





    For more information including installation and adjustment instructions, follow the link below:

    http://www.dropingassystem.com/
    SI VIS PACEM, PARA BELLUM
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  2. #2
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    Nov 2013
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    I've been looking at this since they posted it on FB. I'll let the reviews come out first.


    Sent from my IPhone, please ignore spelling mistakes. Siri is dumb.

  3. #3
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    Nov 2013
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    I'm guessing its a little soon for anyone to have done an independent test on how the adjustment holds up over time and through a high volume of fire? I like the idea of an adjustable BCG gas key but I'm a little hesitant that the only adjustment locking method is a drop of loctite on the screw.

  4. #4
    Join Date
    Dec 2012
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    TN
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    Don't know how I feel about this.

  5. #5
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    I'm with Battle on this. 60 bucks is a bit much for just a key... I'm not dishing that out for something so new.


    Sent from my IPhone, please ignore spelling mistakes. Siri is dumb.

  6. #6
    Join Date
    Jul 2013
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    I always ask...where will the gas go?

    First, lets understand "gas". It is compressible. It is "fluid". It always seeks to equalize its pressure in its environment (from areas of high-pressure, to low, much like water seeks the lowest).

    With the Noveske SB:
    Some gas leaks out around the mechanism, most of it never enters it and continues out the barrel as the area for compression is very small.

    With the Gas-key:
    Since the key/tube is not a perfect seal, and the tube provides significant area for compression in this system, the gas will likely enter the tube in semi-normal quantities, and then be vented into the upper receiver as it spills forward out of the gas-key, and around the gas-tube. This can be seen on all Stoner AR weapons as the tube end and that are of the upper are fouled/sooted. This will exacerbate it by blowing the gasses there, vs. them venting from the 2 holes in the carrier.

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