Yeah, high capacity magazines suck because you have to wind them every 10 shots, at least with mine. Just get a bunch of low-caps and get a mock laser unit to hold a giant battery and you're ready.
I've got the Kilo version. It has an MP5 sight-channel mount on top of the carry handle with a 45mm red dot mounted onto that, the 3x scope of course, three rails on the handguard with laser w/pressure switch, light, and OD ergo grip. I had all of the following installed: M120 Systema spring, CA bore-up kit, Madbull tightbore barrel. They told me it shoots 410fps, I'm kind of skeptical with it though (it must be the battery I am using).