Fully custom kjw build, I have never fielded it. There are less than 100 shots through it. -KJW KC-02 -Rogueworx genesis kit -Rogueworx bolt -Rogueworx piston -Flat Hop -R-Hopped ZCI barrel -3D printed barrel spacers -Daniel Defense stock -Daniel Defense pistol grip -Madbull Grenade launcher -Master Mike -Flashlight-laser -Repro Red dot -Magpul Also included are: -extra magazine -original parts