H3 buffer. Tubb CS buffer spring. Heavy carrier. Newly installed Magpul adjustable stock. Tested eight rounds and functioned perfectly. Cases landed in the same spot as when I had the A2 stock on it. The A2 buffer and H3 buffer weight about the same. The Tubb CS spring will work in the shorter buffer tube with room to spare as it is flat sided not round. What I used in the A2 stock always worked very well, so I tried to keep it the same with the new adjustable stock. I have a 24 inch barreled AA Overwatch.
Greyfox
Greyfox

