Adjustable BCG Gas Key by Sun Devil Mfg.

[zero7one]

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.

https://farm8.staticflickr.com/7223/13647672785_bf04a809b4_b.jpg

https://farm3.staticflickr.com/2923/13647672525_d17fe277a4_b.jpg

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

http://www.dropingassystem.com/

[Judicator]

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.

[Battle Cock]

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.

[GOST]

Don't know how I feel about this.

[Judicator]

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.

[JGifford]

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.