Made from 416R Stainless Steel, this 6MM ARCl is hand lapped, has M4 feed ramps and 5/8-24 Threading, comes with a black nitrided .750 Gas Block and a intermediate gas tube.
Features :
- "21" 416R Stainless Steel Barrel,
- XL rifle gas system
- .875 Adjustable Gas Block
- 5/8-24 Threads
- 1:7.5 Twist
- Barrel Weight: 3lb 9oz