A KWA Ronin 47 gets unboxed by Pheas Airsoft... "In this video we are unboxing the rather lovely Ronin47 by KWA. We have opted for the Drifter Tier 2 edition of it.

RN47: Was from JTAC Customs in the UK.

Battery compartment size (roughly):  3.5cm wide by 2cm high by 12 cm deep. That is if you want to use the full depth, but if you want shorter you could change the 2cm up to 2.5  (there is more room but the width would have to come down and the 12 cm down to 6cm."