Factory built with nickel boron carrier group 12.5 sbr 300 blackout upper. Approximately 50 rds of 220 subsonic through it. Has a troy flip up night sight buis and a Nikon 300 blk scope with Burris one piece mount. $1300 shipped within USA. Also upper has the blackout 51t mount included. Email at firstname.lastname@example.org I have approximately 375-400 rounds of factory remmy 220 gr subsonic ammo to sell also. Buyer of upper has first at ammo and I can do a package deal for it at $1500.