The upper is a complete Saber Defence assembly for AR-15 complete with BCG and charging handle. The barrel is chambered in 5.56 NATO and length is 14.5" with permanently attached A2X flash hider. Handguard is a JP VTAC full length free float tube. Comes with yankee hill front and rear flip up sights, 2 rail sections (installed) and a sling swivel attachments. The upper has about 600 rounds through it. $975 shipped. THE LOWER IS SOLD!!! I would take a quality ar10 308 barrel as partial trade.