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AT44 Won’t turn hammer adjustments CCw or clockwise .

The port behind your pop valve is to small, you need to open it up. Your gun should have came with a extra pop valve seat take it and open it up to .180 and install it. next you have to hold the hammer with a small rod like a Allen from the under side of the gun to adjust the hammer or it will just turn, try and set the hammer at 5 turn out. I'd set the regular to 125-130 bar and open the the barrel transfer port up to 80% of .220 aka .176

That gun will be easily shooting in the 830's and getting 40 shoots per fill