This BCA AR-15 7.5" parkerize M4 contour barrel has a 1:7 twist rate and pistol length gas system. It is chambered in 5.56 NATO.
All Finished Barrels go through a 100% Inspection Process. Inspections Equipment includes CMMs and Air Gauges for the Bores.
It is the responsibility of the consumer to ensure all state, local, federal, and ITAR regulations are followed
Does not include gas block or gas tube