It is Hk416 body with EMG SAI GRY M4 gearbox. The package also include 3 springs: 400fps, 450fps, and m180. It also includes additional gear sets: 13:1(shs-short stroked) + dsg gear from SHS Furthermore, it includes 2 motor(one standard m120 and franksutinemotor from OC airsoft that pulls m180 for dsg) - it should have at least 30TPA I am selling because I am walking away from airsoft; before quitting, I wanted to learn tech stuff, so I decided to disassemble and practice. Now, I just don’t want to as moving away. If you’re experienced tech or player, consider the purchase as the items are high in market value; if you are wannabe tech, it can be kit for practice. Because it is disassemble and don’t need it anymore as well as wanting it to go away quick as moving away from airsoft, it is 250 in all The new price are 300 for HK body 200 for EMG gearbox 13:1 & dsg should sum up to 80 to 90 Motor should be 30+50, so 80. All for 250 now.