DealSPECIFICATIONS Barrel Coating Barrel ContourM4 Barrel Length16 Barrel Material4140 Chrome Moly Steel BrandAnderson Manufacturing Caliber Gauge5.56 NATO Feed RampsM4 Gas Seat Diameter0.750 Gas System LengthCarbine PlatformAr-15 Thread Pattern1/2 X 28 Twist Rate1:8 from Primary Arms (Product AM-04-16M4-1-8) |