I have an polarstar mk18 for sale. This gun shoots amazing. I have an tbb barrel, an guarder nub, and an upgraded HopUp unit which I forgot the brand. It is also flat hopped. It has an fusion engine with an blue nozzle. *Eotech does not work but will be included * The only issue with the gun is the line in the handgrip has an leak in it so it will need to be changed. Message me for more pictures. price is obo