LANTAC™ USAE-BCG™•Caliber: 7.62 NATO/.308•E-BCG™ = Enhanced Bolt Carrier Group •AR10 Full-Auto Style •DPMS Pattern •Forward Porting Enlarged Vents •Balanced flared boss •Heat-treated/Hard-tuned 8620 steel carrier & 9310 steel bolt •NiB UCT EXO coating for extreme lubricity & surface hardness of 82-85 Rockwell C •CP-R360-H domed cam pin •MIL-SPEC gas rings & staked gas key •Grade 8 hardened fasteners •All Hard Chrome surfaces are to MIL-STD-171 1.2.2.2 •Lifetime Warranty •Made in the USA •Wt.: 1 lb. 2.1 oz.