This BCA AR-15 Barrel is a 7.5" M4 contour barrel profile made of 4150 steel with a black nitride finish. It has a 1:7 twist rate and 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.
|Material||4150 Chrome Moly Vanadium|
|Thread Pitch||1/2 x 28|
|Gas Block System||0.750|
|Gas Hole Diameter||0.086|