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This BCA AR-15 Barrel is a 8.5" M4 contour profile barrel made of 4150 steel with a parkerized finish, a Pistol length gas system with a 1:7 twist rate. The barrel is chambered in 5.56 NATO and machined with M4 feed ramps in the barrel extension.Inspections Equipment includes CMMs and Air Gauges for the Bores.
This 8.5" short pistol barrel has the following specs: