New for 2016, the GEN 2 (Spartan Edition) - does not include lipo battery. For the M4 AEG.  The Wolverine Inferno is based off the previous SMP system and is designed to drop into nearly every popular gearbox on the market with no modification.
And, they are constantly altering their design to include even more gun
models. External components are small and easy to fit into the stock,
grip, or handguard of your gun. Just install the Inferno into your gearbox
in a matter of minutes, and youre ready to go!Wolverine Airsoft's high-performance HPA system features straightforward controls that
offer all the tuning capabilities you need on the field to play any
number of roles. The rate of fire and dwell time can be adjusted using
two simple dials on the fire control unit located in your stock, grip,
or rail system. All other settings are internally regulated. This simple
design reduces the number of controls from 7 to 2 so that you can spend less time tuning and more time playing.HPA technology makes cracked gearbox shells and grinding gears a thing of the past. And with less than 50% fewer replaceable parts than other leading HPA products, the Wolverine Inferno is even more durable. This is why Wolverine Airsoft offers a 9 month warranty
on their system. Maintenance involves only simple lubing with an
occasional replacement of an o-ring after several hundred thousand
rounds. And, if something does go wrong, the Inferno is extremely easy to
troubleshoot and repair.

Kit includes everything in the picture, except for the 7.2v LiPo battery (LiPo battery and charger sold separately, is required to charge it).  Battery is not included.