The 8.4 subc battery that I received with my original 416 fit a little snug in the clone 417 style stock, although I simply attribute that to a poorly built stock. Then again it also fit a little snug in my hurricane 417 style stock, so actually it was just a crappy battery. Actually yes it was a craptastic battery. Anyways when I had my CBP 9.6 sub C I had no issues fitting in either stock...well actually it was still slightly snug in the clone 417 but not as bad as the original 8.4 china subc.
"Its only a little bit on fire"