6.MM ARC Complete Upper Specs:
- CORE® Lifetime Warranty
- CORE® 7075-T6 Aluminum Forged Mil-Spec Upper Receiver
- Ambi Charging Handle
- 20" Stainless Steel Barrel / 1:7.5 Twist
- A2 Flash Hider
- 15" Free Float M-LOK Handguard
- Grendel Type 2 BCG
6.MM ARC Complete Upper Specs: