[Long_Bong]

Hi,

I currently swapping a TM M4 body for a D Boy metal body.

Would a King Arms M4/M16 Enhanced Hop-Up Unit work on this body?

Or a G&P M4/M16 Metal Hop-up Set?

Or a Deep Fire M4/M16 Hop-up Unit?

And if they all work, which one would be deemed the best?

Thanks,