Great build quality, takes small batteries, probaly 7 cell max, very accurate, a tad bit heavy in the front from the full Metal upper receiver. It has ris rail system on all four sides of the gun, the rail on top is continuing the whole length of the gun. This gun is an aeg built for a dmr platform. Full auto and semi auto firing modes. Does not come with sling bipod or scope. The mp5k and glock18c is just for size comparison.