Resurrecting this thread because in searching for this answer, I found my same question. My concern is very similar, verifying that the CZ Custom P-09/P-07 CZ Competition hammer is legal in IDPA SSP. My understanding is that it is because it has the exact same external dimensions and appearance as the non-Competition hammer which is sold in all standard P-09s and P-07s. In addition, if it is a CZ-UB part, that completes the validation that it is SSP/Production legal.
Need assistance from someone with more knowledge and experience to verify or correct my conclusion. Thank you in advance.
