There were a few issues I’ve had with my valve.
Firstly, the translucent plastic adjusting screw was so tight fitting in it’s threads that the provided metal tool to adjust it did a lot of damage when adjusting, especially when performing the adjustment with it installed inside the nozzle. During testing, to adjust FPS, I had to disassembly the whole damn bolt to take the valve out then very carefully screw in/out to prevent further stripping, which was a major pain in the ass.
Secondly, with the valve at its maximum setting I got to 1.3 joules, 102m/s with 0.25, and found that it was not consistent either. For example, with a fully gassed up mag I could get 102, then 95, then 103, then 94. Compared to the stock valve which barely has a deviation of 2m/s for me. It could be that this is because the valve was in a position where it was “too maxed out”, but for me the whole point of installing the valve was to reach the 5m minimum engagement distance limits here in Sweden (1.7j) so it’s not fit for my requirements.
But there is someone here who uses the valve and has good performance, so I wonder if mine is a lemon or if it’s not the right one for my barrel length? I followed the guide on jkarmy for which one to get but maybe getting a valve for a longer inner barrel in order to over-gas the system and get more joule creep would be better.