||I have had my KWA m4 for 9 months and only last week did i have to do any internal work.
Very much 11.1 LiPo ready. Have only had to swap pistons once.
Putting rails and other accessories is a breeze.
RoF with 11.1 is around 25rps
Internals are solid as a rock
Flashhider is reallllllly hard to get off.
Battery space with hand guard is not super huge. I put rails and a peq box on mine.
KWA has proprietary parts in their gearbox. (9mm bushings, there are no replacements, but you shouldnt need new bushings)
kinda picky with mags.
Overall this gun is amazing. i have barely had to touch it internally, and with some daniel defense rails it looks amazing. 5/5
Rating: [5 of 5 Stars!]