BCA 20" 6.5 Grendel 1:8 5R Twist Black Nitride Rifle-Length Contour Barrel w/ Straight Flutes
Bear Creek Arsenal products complete their entire production cycle at their Sanford, North Carolina facilities. Drilling, reaming, rifling, and turning are all performed on CNC machines under ISO-9002 Quality Systems, allowing Bear Creek to precisely control each step of manufacturing. Careful inspection ensures each barrel meets their stringent standards before shipping.
This?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 rifling 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.
Bear Creek Arsenal guarantees 1 MOA grouping at 100 yards when appropriate shooting techniques and high-quality ammunition are used.
NOTE: Bear Creek Arsenal does not recommend using steel cased ammo in their assemblies or rifles.
- 4150 chrome moly vanadium HBAR barrel with black nitride finish?
- Chambered in 6.5 Grendel Type II with a 1:8 twist rate
- 5/8x24 thread pitch
- M4 feed ramps
- Straight flutes
- Gas seat diameter: .750?
- Gas port diameter: 0.093?
- Weight: 2 lbs