Grid Defense HEX 16" 5.56 NATO Upper Receiver - Gold

• FX Gold Cerakote Finish
• Chambered in 5.56 NATO
• 16" 4150 Nitride Barrel
• 1:7 Twist Rate
• 1/2x28 TPI Thread Pitch
• Black A2 Muzzle Device
• Carbine Length Gas System
• Low Profile Gas Block
• Grid Defense HEX 14" M-Lok Free Float Hand Guard
• Grid Defense Mil-Spec 7075 T6 Upper Receiver

*****Ammunition Notification***** Grid Defense test fires every custom upper to verify cycling. We do not guarantee cycling with all ammunition due to vast differences in the quality of ammunition. We will only warranty cycling with US made ammunition. We will not warranty cycling with imported, steel cased or reloaded rounds.