BCA AR-15 Barrel: 20" 4150 Black Nitride Contour Barrel, 6.5 Grendel Type II, Straight Flutes, w/ 1:8 5R Twist
- 20" Black Nitride 4150 Chrome Moly Vanadium Barrel
- Heavy Barrel Profile
- 1:8 5R Twist
- Straight Flutes
- 6.5 Grendel Type II Caliber
- Mid Length Gas System
The BCA AR-15 Barrel is a 20" contour barrel profile made of 4150 steel with a black nitride finish. It is straight fluted with a 1:8 5R twist rate and is chambered in 6.5 Grendel Type II.
5R is an improvement over conventional rifling by changing the shape and configuration of the lands and grooves. Conventional rifling consists of either 6 or 4 symmetrical lands and grooves; however, in a 5R barrel, the lands and grooves are opposite of each other and sloped.The improvement reduces projectile deformation as it passes through the bore during the firing sequence and the projectile stays uniform instead of squeezing material on opposite side grooves. Hence, the more uniform projectile, the better the accuracy.
All Finished Barrels go through a 100% Inspection Process.
Inspections Equipment includes CMMs and Air Gauges for the Bores.
BCA's expectations is that our Barrels, 16 inch or longer, will hold a 1.000" MOA at 100 yards with appropriate ammo and shooting techniques.
ALL NFA LAWS APPLY
|Material||4150 Chrome Moly Vanadium|
|Thread Pitch||5/8 x 24|
|Caliber||6.5 Grendel Type II|
|Feed Ramp||.300 Blackout|
|Gas Block System||0.750|
|Gas Hole Diameter||0.099|