This is a fully upgraded, ready to run Tokyo Marui breacher shotgun. Internally the gun has fully replaced internals with all steel parts to run higher PSI (max 90) for a higher FPS. This shotgun runs 350 with .20 Bbs. Externally it is also fully decked out, at the tip it comes with a gen 4 PCU tracer unit, a replaced cocking handle with rails for lights and foregrips. It come with a primary adapter to run m4 mags, as well as an upgraded rail to mount any optics you desire. Lastly, in the grip it has an HPA tap to run a tank, making this unstoppable on the field. Either for purchase or specific trade. Looking for either a polar star f2 build, or an f2 engine and cash. Lookin for 600 or best offer, payment through payment buddy Thanks for checking it out, feel free to reach out with more questions