FEATURES-Bolt & Extractor (.308 compatible)-Bolt Carrier-Extractor-Cam Pin-Carrier Key-Firing PinPRODUCT SPECIFICATIONS:Dimension 1.55 X 4.00 X 13.05Height 1.5500Width 4.0000Length 13.0500TYPE/COLOR AR10 COMPLETE BOLT CARRIERSIZE/FINISH .308 WIN/CLASSIC FINISHMATERIAL STEELOTHER FEATURES: DPMS PATTERN/6.5CM COMPATIBLE, EXO NICKEL BORON TREATED, DROP IN INSTALL FOR MOST MIL-SPEC AR10 UPPERSNO DIRECT SHIP TO CALIFORNIA