RAT Worx has had this AUG A3 suppressor out since 2013, but they brought it out for Bullpup Shoot 2015 and it was on the line, available to all. The interesting thing about it is that the company redesigned the AUG piston system, shortening it down just a bit, and adding a plug into the end opening of it, that is connected to their suppressor. This allows all the excess gas from the operation of the piston system to bleed into the suppressor itself, and thus eliminating any sound that came from the gas tube, a common problem with many suppressed firearms but specifically with the AUG.
This is from their description on the website, including MSRP-
It will work with every Steyr AUG rifle in 5.56 (A1, A2, A3, USR), but is only built for the 16″ barrel.
Due to the many different barrel gas port sizes used on the MSAR series of rifles, we cannot guarantee proper operation of the MSAR rifles if used with this suppressor.
The barrel threads on these suppressors are 13×1 Left Hand, standard threading for Steyr AUG rifles…they will not fit 1/2×28 AR15 Right Hand threads.Price: $650.00
This is on the line with the RAT Worx suppressor mounted, on semi and full auto. I haven’t shot an AUG unsuppressed, but I will say there was a significant amount of gas leakage coming back at me, not making it uncomfortable to shoot, but just more annoying than anything.
Now, I’m well aware that sound is one of the worst systems of measurement, but just as a comparison between the two kinds of suppressors out there for the AUG, this is the difference.
Then this is a video from RAT Worx showing how to put everything together, look at the parts about the gas system that bleeds into the suppressor.