very sturdy rifle. got mine 2 years ago and i was realy impresed. the rails were somewhat of a let dowm(they were molded ,not mashined.) they had the dendency to screw off in the middle of battle. how ever after instaling a gas block and folding sight,the problem has seemed to disapear.
i have done a lot of modifacaton on mine . but it heled up for about 16 months befor striping a gear (thanks to an m140 spring) but the motor can push an m140 spring !! however i had to upgrade to a 10.8 volt battery. (prety hard to fit in the stock , but i managed) so all in all , good gun easy to upgrade.
metal body .(easy to take apart)
7mm bearings.( easyer on the gears)
good stock motor.
easy to upgrade.
1 piece barel
stock and pistolgrip are made of good matrial
flash hider was easyer to get off than any jg or echo 1 i have owned in the past
decent stock internal parts(although i replaced most of them after about a year.)
good placement of slingstud on front of rifle.
not a whole lot.
wobly rails (fixed with a gasblock.)
front sight hard to remove.
hop up could be better.
Rating: [5 of 5 Stars!]