CORE® 6mm ARC Upper

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