The tavor sar flattop b16 is a semi-automatic rifle that comes with a closed rotating bolt and a long gas stroke on the piston head.The tavor sar flattop incorporates a full-length mil-std picatinny top rail in addition to the standard short rail mounted at a 45 degree angle opposite the charging handle.The 16.5" barrel is made of crmov steel, chrome-lined and cold hammer forged.The stock has reinforced polymer bullpup configuration.Rifle has folding blade front sight and folding aperture rear sight.This rifle uses a polymer nato stanag type magazine.Metal Finish: BlackAction: Semi-AutoCaliber: 223 Rem/5.56 NATOBarrel Length: 16.50"Capacity: 30+1Oal: 26.13"Weight: 7.90 lbsStock Description: Polymer BlackSights: FoldingBarrel Description: Hammer Forged, Chrome LinedTwist: 1:7"Barrel Length Range: 16.00" to 17.99"Weight Range: 7 lbs to 7.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black