i got this gun new from the boneyard. the only issue was a hop up turned/bent slightly so that the mag wouldn't lock in. it failed gi's quality control test according to a slip of paper inside the box. the internals were untouched and it had never been dissassembled. it was obvious from the pristine body, and every screw, bolt, etc was still solid black.
here's the deal: this is a good gun for somebody that knows how to work on a gearbox. the body is great, except for the craptastic stock. it's very solid and has a nice weight to it. the problem is that the internals are a time bomb if you don't do some serious work. the angle of engagement of the piston was so bad that the few hundred rounds i shot through it almost took off the first four teeth and i had to replace immediately(you won't have to if you do some work). the shim job was also terrible, really terrible. i swear there was over 1/8" play on at least one gear.
it also needs to be greased a lot. i've never seen this little grease in a gearbox. that contributes greatly to the noisy, whiny, screaming sound of it. the piston head needs some grease; doing that gave me a near perfect air seal. also, by shimming you will increase rof a lot which will in turn compress the spring a little too fast leaving you with a twangy sound at the end of each shot in semi.
i would recommend replacing the spring right away. i recommend an irregular pitch spring to save your piston. in fact, a new piston wouldn't be a bad idea(though not necessary if you shim, work on aoe, and shave off most of the second tooth).
solid upper and lower reciever.
good upgrading platform
can be good stock with some love
nice weight to it
(mostly) full metal
working bolt release is definitely cool
that motor is definitely high-torque
pretty good rof with good shimming
3 point sling it comes with is actually pretty nice
internals need immediate surgery
shimming, good lord that is some horrible shimming
stock feels easily broken
kinda difficult takedown
not for noobs with no gearbox experience
this will break quickly stock
gearbox also will need a small ammount of filing to eliminate rubbing
Rating: [3 of 5 Stars!]