Run AiA with CO in A3:
https://dev.withsix.com/projects/all-in-arma/wiki/All_in_Arma_Install_guide
1) Make a config dump of cfgRecoils (run attached mission) to rpt and compare vs plain A3. Notice the missing definitions and faulty modifications.
2) Play different scenarios in SP/MP, switch weapons, use save-load. In some cases weapons will no recoil at all.