Description: Wolverine Hydra V2 M4/M16 HPA System (PRE-ORDER) Why the name? Hydra is a legendary creature from Greek mythology. This dragonlike beast was supremely feared for its many heads. Like its namesake, the Wolverine Airsoft HYDRA is one body sporting MANY heads! The HYDRA is designed to work with any centered or offset nozzle design with changing only ONE PART! You heard that right! The same body will work in your M4, AK, M14, P90, PDR and many more by JUST SWAPPING THE NOZZLE! What is different than the SMP? While both the SMP and HYDRA use the same patented technology, the two systems are packaged very differently internally. The more compact streamlined design of the HYDRA makes room for the offset nozzles as well as an internal air line. In addition HYDRA has been designed so that no tools are needed to disassemble for service. Expect to hear more from us soon on a new design for the electronics as well! Are Parts Interchangeable? Mechanical parts are NOT INTERCHANGEABLE between the two systems except for the valves. Electrical parts, however, are completely interchangeable between the two systems. This compatibility allows customers to upgrade controls as well as making it easy to find replacements for some of the more vulnerable components of the system such as the wire harness. What nozzles will be available? With the launch we will have all of our standard nozzles available that we have for the SMP, in addition we will have the following: A&K Masada AK G&G M14 M249 M4 P90 PTS Masada SCAR-L SCAR-H SR25 TM/CYMA M14 XCR We will continue to gather measurements for and create nozzles for more options going forward. Let us know what you want us to offer!