Bushmaster model xm-15-e2s, sn bfi592809 223-5.56mm, retractable stock. 16 inch barrel and removable top handle for mounting a scope. there are a lot of ar-15's out there but if you know guns this bushmaster is top of the line. Case, three mags and four boxes of ammo are included, bayonet was mine in the Army and will go with if $800 is offered. used the gun twice target shooting and a total of two boxes of ammo were used. I have a front handle but it requires different barrel guards. you can have it in case you make any alterations to the gun. call Jake REDACTED