This is a upgraded licensed A&k ACR it has the piston in the photograph and a shs motor. It also has a new bucking for better feeding This package comes with everything you need to get started and playing -gun -grip - 3 flash mags -battery/ Charger All of this costs roughly $420 new and it has been used minimally. I am willing I negotiate but this isn’t a bad deal to begin with. *attachments are another 150 if u want them